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  1. dw1305

    Everything deficiency - Thinking toxicity (Low tech)

    Hi all, The "bicarbonate ion", the <"form of TIC you have is pH dependent">, and you only get the carbonate ion (CO3--) in solution in very alkaline conditions. <"Group II metals are the "Alkaline Earth" metals"> like calcium (Ca) and magnesium (Mg). All the metals with a valency greater than...
  2. dw1305

    Everything deficiency - Thinking toxicity (Low tech)

    Hi all, Calcium (Ca++) definitely wouldn't have any effect, because we are only interested in the anions, NO2- and Cl-. After that <"it is just a numbers game">, if you have enough Cl- ions in solution the "next bus (ion)" is, nearly always, going to be a Cl- ion, rather than a NO2- ion. My...
  3. dw1305

    Everything deficiency - Thinking toxicity (Low tech)

    Hi all, Yes, I'd be pretty happy with that. cheers Darrel
  4. dw1305

    Waterbox 3620 first planted attempt

    Hi all, Yes it is just the chelator that is important. I don't actually know, I'd guess that it doesn't make any practical difference. Yes like @Wookii says add <"some magnesium (Mg)">, your unlikely to have any in your tap water <"for geological reasons">, and there isn't really a downside...
  5. dw1305

    Waterbox 3620 first planted attempt

    Hi all, I think <"that is FeDTPA"> as the chelator, so it should be good. It takes a while for new green leaves to appear after iron stops being <"Liebig's limiting nutrient">. cheers Darrel
  6. dw1305

    Waterbox 3620 first planted attempt

    Hi all, Very pale growth is never a good thing, because it means that that growth <"is deficient in chlorophyll">, dark green = more chlorophyll. Because it is the new growth that is chlorotic it strongly suggests that you have issue with iron (Fe) availability. It is generally really...
  7. dw1305

    Waterbox 3620 first planted attempt

    Hi all, Are the new leaves really pale green, or is that just an artifact of the light in the photo? cheers Darrel
  8. dw1305

    Yellow Pebblequarium

    Hi all, Nice. cheers Darrel
  9. dw1305

    Project II - 5 Gallon Low Tech Cube Tank

    Hi all, Some <"meters and tests work fairly well">, but others are more problematic. That is why I like to "watch the plants", the plants can lie. cheers Darrel
  10. dw1305

    Project II - 5 Gallon Low Tech Cube Tank

    Hi all, Exactly what @Kalum says, you just use the <"health and colour of the leaves of a floating plant"> to assess the nutrient status of the tank, and when to add nutrients. I called it the <"Duckweed Index">. "Duckweed" was because the original plant I used was <"Lesser Duckweed (Lemna...
  11. dw1305

    Pico Pond

    Hi all, Definitely Poa annua. The Utricularia looks really good. cheers Darrel
  12. dw1305

    Small Daphnia culture

    Hi all, I would have thought so. cheers Darrel
  13. dw1305

    Small Daphnia culture

    H all, Mine have lids on them. The Daphnia feed on any suitable sized items in the water column, so I assume that there are enough rotifers, paramecium etc to keep them going without any algae. When I say you get a trickle of Daphnia, I really mean a trickle, we are talking about a handful or...
  14. dw1305

    Technically my third tank, I guess

    Hi all, The Cherry Barbs do look a bit chubby. I still get that feeling of achievement, even now. cheers Darrel
  15. dw1305

    Creepy Hollow

    Hi all, I've never seen an AI Prime "in the flesh" so @Wookii is much more likely than me to be correct. If they look bright at 25%? Then they probably are Plant what you have got and then observe how the plants are getting on. I like a floating plant because, it isn't ever CO2 limited. Have...
  16. dw1305

    Creepy Hollow

    Hi all, I know it is difficult, because all the advice you read on forums (and get from LFS) talks about ammonia, bacteria and cycling, but <"none of it is true">. It is a bit like asking how you get from Bath to London? and then everybody advises you that you need to make sure your horse is...
  17. dw1305

    Creepy Hollow

    Hi all, <"That article was written in 2010"> and doesn't reflect <"what actually happens in aquarium filters">. Have a look at our thread, <"Dr Timothy Hovanec's comments about Bacterial supplements">, it is a long read, but I hope you'll find it interesting. Same really, nitrification doesn't...
  18. dw1305

    Creepy Hollow

    Hi all, Put them in the tank, but turn <"the lights up so that they are fairly bright">. Because they are floating plants they aren't CO2 limited, but if they don't get enough light to get <"above LCP"> they will be dying, rather than growing, and that isn't going to help. I know @Wookii is a...
  19. dw1305

    Iwagumi Journal for an EPQ

    Hi all, Best of luck, it should be perfect. My daughter used a tank for <"her GCSE Art project">. cheers Darrel
  20. dw1305

    Always room for just one more....

    Hi all, <"Nothobrachius rachovii"> cheers Darrel
  21. dw1305

    Always room for just one more....

    Hi all, I think it might be a <"Pseudomugil"> sp. I think they like <"vertical stems to rest on">. cheers Darrel
  22. dw1305

    Tidy Jungle II

    Hi all, I weigh the fish food out and put it in date labelled containers in the fridge, then whoever comes in just has to take the container. I don't worry about the water changes when I'm away and the only other thing I do is clean the pre-filter sponge and hoses (but not the filter media) and...
  23. dw1305

    Tidy Jungle II

    Hi all, I have <"a story for you">. cheers Darrel
  24. dw1305

    ‘Lazarus’...80x40x40, back on track!

    Hi all, Tank looks great. I'm interested in this bit. cheers Darrel
  25. dw1305

    Pico Pond

    Hi all, I do. You just need the top tuft of moss to look less dry. That would be very nice. <"Rhynchospora (Dichromena) colorata">. It is a Sedge relative (Cyperaceae), so definitely not what is growing at the moment (which is a true grass Poaceae). cheers Darrel
  26. dw1305

    Pico Pond

    Hi all, My guess would be that there is plenty enough light. The grass looks like Poa annua. The moss looks a bit dry, I might try a cover? (cling film) or possibly add a bit more water? cheers Darrel
  27. dw1305

    Creepy Hollow

    Hi all, I would <"very, very strongly"> recommend <"not doing this">, but have a read through <"Dr Timothy Hovanec's comments"> before you go any further. I really like a floating plant for start up, any will do, but my favourites are <"Amazon Frogbit (Limnobium laevigatum)">, Hornwort...
  28. dw1305

    The Nymph's Spring (EA900)

    Hi all, If I see the in a shop I always have a look to see if there are any females. Usually it is just males, but you really want a mix of ~ two males to five females. They are good dither, but great jumpers. They are another fish <"that I will keep again">. I'd definitely get a <"vestigial...
  29. dw1305

    The Nymph's Spring (EA900)

    Hi all, You can't go by them in the LFS. They <"colour up really well when they are happy">, you get a real <"turquoise sheen to the body"> on the males, and you have the fin-flicking display as well. They are fine, but they jump and they aren't the easiest to keep. I've had all <"three of...
  30. dw1305

    Cape Clear

    Hi all, <"We have a few">. I'd be tempted to <"re-calibrate the probe every half hour">, we usually do it every tenth sample when the probe is in continual use (where we have lots of separate samples). cheers Darrel
  31. dw1305

    Kinabalu (60 x 40 x 40)

    Hi all, It may be, if you have a lot of tightly packed rosettes and high humidity they will often <"produce aerial leaves and flower">. It would make sense for the plant to make a "land grab" while the going was good. cheers Darrel
  32. dw1305

    Kinabalu (60 x 40 x 40)

    Hi all, My guess is that it is just a nutrient effect, and that yours are getting plenty (possibly partially from the water changes) of everything. cheers Darrel
  33. dw1305

    Kinabalu (60 x 40 x 40)

    Hi all, Amazing, I've never had any that healthy. cheers Darrel
  34. dw1305

    The Nymph's Spring (EA900)

    Hi all, Right up there with <"pump in a bucket">. cheers Darrel
  35. dw1305

    The Nymph's Spring (EA900)

    Hi all, I think @Wookii was after the plastic media? If people don't have an alternative, I actually quite like the Kaldnes K1 type <"floating cell media"> and I wouldn't have any reservations about using it. Same as @ScareCrow for me, if you have your sponges in the pre-filter you probably...
  36. dw1305

    The Nymph's Spring (EA900)

    Hi all, As soon as I saw the video I thought of you. cheers Darrel
  37. dw1305

    The Nymph's Spring (EA900)

    Hi all, Ah the <"PondGuru">, he gets a <"few mentions on the forum">. I'll copy in @MirandaB as I know <"she is a fan of his">;). Personally I think his advice is a mixture of <"the good">, <"the bad"> and <"the downright ugly">. He has a <"product to sell">, it is different for us, we...
  38. dw1305

    Small Daphnia culture

    Hi all, I really don't know, but my suggestion is give it a go and see what happens. cheers Darrel
  39. dw1305

    Meander

    Hi all, No, they won't cross-breed. My guess is that they will probably largely ignore each other. cheers Darrel
  40. dw1305

    Meander

    Hi all, The male is Apistogramma agassizii & the female is A. cacatuoides? cheers Darrel
  41. dw1305

    Mini M - Classic Nature

    Hi all, <"I'd have cried">. I really don't understand how you can persuade people to buy <"bespoke dilute fertiliser mixes">. You talk about aesthetics <"with a light or a filter">, but with fertilisers <"an ion is an ion is an ion">. cheers Darrel
  42. dw1305

    Andys 60p

    Hi all, I'd definitely recommend some floating plants as well, they aren't CO2 limited, and they are <"adapted to bright light">, which allows them to make use of any "spare" nutrients. Ceratopteris "thalictroides" is another good "starter plant". cheers Darrel
  43. dw1305

    Technically my third tank, I guess

    Hi all, I think that you will get some more. <"Panda Cories"> are quite likely to <"raise a trickle of fry">, when they are happy. They are good in hard water and about the only locally bred Corydoras you ever see here (water about18dKH) Corydoras have the cutest fry any way and Corydoras...
  44. dw1305

    Something... Something... Shallow Tank

    Hi all, "Well" would be my guess, although even the summer may be too cool for it. cheers Darrel
  45. dw1305

    Something... Something... Shallow Tank

    Hi all, I grew for a <"while emersed and it did quite well">. I've never tried it in a tank, and I think it was cold that killed it in the end. As a plant it doesn't <"actually have any roots"> (no Utricularia spp. does), so I guess the planting medium doesn't matter that much. Other than...
  46. dw1305

    Cape Clear

    Hi all, No, you are good, you have been dosing the right amount. What ever yours says on the packet it will be the heptahydrate (MgSO4.7H2O), and ~10% Mg, when you use it. Have a look at <"Quick question about MgSO4">. cheers Darrel
  47. dw1305

    Nature's Hideout

    Hi all, You are right, definitely not U. gibba. I'm not sure, it might be Cladophora, if it is it will be "gritty" when you roll it between your fingers. cheers Darrel
  48. dw1305

    Ryuboku

    Hi all, Nice, my guess is that she is a she, and definitely A. agassizii, although I don't have a very good record identifying or sexing Apistogramma. These are my last pair (apologies for the quality of the video), I had some fry from these but they were all male. cheers Darrel
  49. dw1305

    Nature's Hideout

    Hi all, Difficult to say from the photo, but it seems to have little bumps on the stem? Which make me wonder about <"Utricularia gibba">? cheers Darrel
  50. dw1305

    Cape Clear

    Hi all, I think you are right they may well be related, I'd definitely pick all the damaged leaves from the Frogbit. cheers Darrel
  51. dw1305

    First effort - a rod for my back!

    Hi all, I am, but I've never added carbon or aimed for optimal growth rate. I have some experience of running <"the lights continuously as well">. cheers Darrel
  52. dw1305

    Yet another newbie

    Hi all, Well done, the new growth definitely looks healthier. cheers Darrel
  53. dw1305

    120cm Nature Aquarium

    Hi all, I've <"always used a 12 hour day">, using the same reasoning., but I don't add CO2 and all my tanks are nutrient depleted. cheers Darrel
  54. dw1305

    Fractal

    Hi all, It is only likely to be iron (Fe) or manganese (Mn) that <"cause chlorosis issues"> with new leaves. This is because <"they aren't mobile within the plant"> and the plant can't shuffle them from old to new leaves in the way that it could with magnesium (Mg), nitrogen (N), phosphorus (P)...
  55. dw1305

    Fractal

    Hi all, Simple enough really, a lot <"of iron compounds are insoluble">, particularly in water above pH7. If we add a soluble iron salt, like ferric chloride (FeCl3.6H2O), to hard, oxygenated water then the iron ions as almost immediately mopped up by <"phosphate (PO4--)">, bicarbonates...
  56. dw1305

    Fractal

    Hi all, I might try a different <"chelator for iron">. Have a look at @jameson_uk's threads linked from <"Is this amazon frogbit ?">. I think your plants show distinct similarities to these. cheers Darrel
  57. dw1305

    40x40x40cm cube

    Hi all, I was just thinking that, but presumably with a high-end cost as well as appearance. cheers Darrel
  58. dw1305

    120cm Nature Aquarium

    Hi all, Not that then. I'm really struggling. I might try adding some Oak leaves or Alder cones, they would bind any potential heavy metal issues, but they will also <"tint your water">. As a last resort I might try a minimal amount of sodium chloride (NaCl). "Table salt" would be fine...
  59. dw1305

    120cm Nature Aquarium

    Hi all, I agree with @Wookii, the tank looks fine (plant growth looks good) and I think it is pretty unlikely that it is the potassium bicarbonate (KHCO3). A thought occurs that it might be a calcium (Ca) issue or even possibly sodium (Na). I've never deliberately added sodium to my tank, but...
  60. dw1305

    Cape Clear

    Hi all, That was the same Issue I had with it, it always ended up <"under the other floating plants">. cheers Darrel
  61. dw1305

    45x27x30, ‘Apocalypse Now!’

    Hi all, Could be, Physella acuta is a hermaphrodite, but I give you <"Crepidula fornicata">. cheers Darrel
  62. dw1305

    Cape Clear

    Hi all, It is something Paulo @LondonDragon mentioned to do with the forum upgrade. cheers Darrel
  63. dw1305

    Cape Clear

    Hi all, <"Cheating really">, I've got a good memory, so I can often remember threads and sometimes <"the protagonists">. I can find a lot of my posts, relying on unique terms <"Radial oxygen Loss">, <"Plumbosolvency">, <"Groat"> , <"One Legged Irishman"> etc. but that doesn't work as well for...
  64. dw1305

    Cape Clear

    Hi all, I like them as well, <"it just makes things easier">. cheers Darrel
  65. dw1305

    Progression - ADA 75P - partially planted

    Hi all, <"Pretty standard in "horticulture">. When you have many shops selling non-aquatics you know that are considerable proportion of the aquarium plant buying public aren't particularly knowledgeable. There is a more complete discussion of the economics of plant production in <"What's...
  66. dw1305

    Channelling my inner Filipe - Christmas Corys

    Hi all, I'd be pleased with them, they look really good. I've noticed this as well particlularly when I feed Micro worms. The fish become active as the cloud of Micro worms approaches them, they definitely aren't seeing them, so some olfactory stimulus must tell them that a snack is arriving...
  67. dw1305

    Fractal

    Hi all, Yes, let it grow, it looks great. A larger plant mass might also help to control the green algae. Probably manual removal is your best hope. cheers Darrel
  68. dw1305

    Fractal

    Hi all, I wonder if the green algae is a <"Spirogyra spp">. They are <"famously difficult to control">, due to their <"physiological similarity to higher plants">. cheers Darrel
  69. dw1305

    Yet another newbie

    Hi all, My guess would be that the true values lies somewhere in the middle. Nitrate testing isn't <"entirely straightforward">. What does the water report (from Thames Water?) say for your postcode? Water companies have an analytical lab. and the values they report will be accurate. Tap...
  70. dw1305

    Nature's Hideout

    Hi all, Forty minutes is dangerously close, I'd definitely have to ration my visits.....Just had a look, less than £10 a fish. cheers Darrel
  71. dw1305

    Everything deficiency - Thinking toxicity (Low tech)

    Hi all, I'd be a bit worried about this, my guess is that it isn't the lamp, it is your eyes, they are very good at adjusting through several orders of magnitude of light intensity. If the light looks dimmer you probably aren't getting anywhere near the <"Light Compensation Point for...
  72. dw1305

    Nature's Hideout

    Hi all, That is a real issue <"with some fish">. I assume they aren't commonly imported to the UK. I've seen the on <"Aquarium Glaser's list"> and a shop like <"Utaka"> would stock them, but I've never seen them for sale in the UK. cheers Darrel
  73. dw1305

    Nature's Hideout

    Hi all, Krobia xinguensis, definitely not an everyday fish. I should have also said that one looks in tip-top condition. cheers Darrel
  74. dw1305

    Cape Clear

    Hi all, They look like they might be filamentous diatoms <"Fragilaria/Synedra">. The other option is the Green Algae (Rhizoclonium), it is also fine threads and brownish, but has a bit more of a green undertone. They are <"both fragile threads">, but you can do them by feel, "Synedra" spp. have...
  75. dw1305

    my fake 45p and 45f hobby return.

    Hi all, Welcome back, it has been a while. cheers Darrel
  76. dw1305

    Keetchy's 60L tank of joy

    Hi all, Obviously good plants to start off with, but they look like they are in active growth and they haven't shed their old leaves etc. cheers Darrel
  77. dw1305

    Keetchy's 60L tank of joy

    Hi all, Plant health looks good. cheers Darrel
  78. dw1305

    Yet another newbie

    Hi all, No, it looks to be <"iron (Fe) deficiency">, small, pale, yellow, chlorotic new leaves are usually a sign of <"lack of available iron">. Because you live in SE England you are likely to have plenty of NO3- in your tap water, but you will have hard water and iron deficiencies are much...
  79. dw1305

    Channelling my inner Filipe - Christmas Corys

    Hi all, Those are large eggs for a relatively small Corydoras sp. cheers Darrel
  80. dw1305

    Channelling my inner Filipe - Christmas Corys

    Hi all, It depends little bit on the species, some lay batches of eggs on the glass, but they often lay their eggs singly on plants. If you go to <"PlanetCatfish"> or <"ScotCat"> it has breeding reports for the different species. cheers Darrel
  81. dw1305

    Channelling my inner Filipe - Christmas Corys

    Hi all, Same for me, due to the shape of the dorsal / caudal black stripe and the peppering of dots on the flanks. <"Nice fish"> and a good find. cheers Darrel
  82. dw1305

    Everything deficiency - Thinking toxicity (Low tech)

    Hi all, Thank you. cheers Darrel
  83. dw1305

    Yet another newbie

    Hi all, I like it personally, all rocks will naturally have a <"green patina">. Plant health looks really good. cheers Darrel
  84. dw1305

    First effort - a rod for my back!

    Hi all, I know nothing about aquascaping, but the wood looks good to me. Just a thought could you find some more little rounded black pebbles, for the transition between sand and soil? They could be really small where they spill onto the sand. cheers Darrel
  85. dw1305

    Channelling my inner Filipe - Christmas Corys

    Hi all, I've never seen a true <"C. julii">, but I have seen various by-catch , <"long-nosed"> & <"C number Corydoras"> mixed in with the "C. julii" in shops. cheers Darrel
  86. dw1305

    Channelling my inner Filipe - Christmas Corys

    Hi all, Yes, they are a bit smaller than <"Corydoras trilineatus">. You need at least five, but after that it would depend on the bottom area of the tank. You may be able to find hobbiest bred ones cheaply, they are about the only locally bred Corydoras you ever see in the shops here, I...
  87. dw1305

    Channelling my inner Filipe - Christmas Corys

    Hi all, <"Corydoras panda? "> Do well in hard water and are not too big. cheers Darrel
  88. dw1305

    New Decade, New Decadence...

    Hi all, .......... I might even try aquascaping, now I know the secret. I'm a great believer in "good things come to those who wait", so I may have to practice the drinking and listening bit first...... cheers Darrel
  89. dw1305

    Everything deficiency - Thinking toxicity (Low tech)

    Hi all, Salt (NaCl) is a non-starter for planted aquariums, because of the sodium (Na)content. Some people use a salt dip for external parasite etc., but it isn't a route I'd ever go down. cheers Darrel
  90. dw1305

    ADA Cube Garden 90P Build

    Hi all, It is a bit more work than just turning the tap on. If you have a house rather than a flat etc. It is just a case of fitting a water butt to the down-pipe from the guttering. I have five water butts, three at the back of the house and <"two at the front">. I use the water for the all...
  91. dw1305

    ADA Cube Garden 90P Build

    Hi all, Is rainwater an option? cheers Darrel
  92. dw1305

    STOPGAP

    Hi all, I've got that one covered, you just have to think: "not algae, you mean the <"highly beneficial periphyton">. Ferns, Aroids and other rosette plants <"are definitely the way forward">, when you are time limited. @Andrew Butler has a <"Low maintenance..."> thread. <"Floating plant...
  93. dw1305

    45x27x30, ‘Apocalypse Now!’

    Hi all, It isn't stable and will rapidly decompose from ozone (O3) to oxygen (O2). This what <"the link"> says about its toxicity. Ozone is a really <"strong oxidiser and biocide">, meaning that you can only use it because it isn't persistent. Yes, unfortunately that does sounds likely. Do...
  94. dw1305

    45x27x30, ‘Apocalypse Now!’

    Hi all, <"Ozone">, I didn't know that. That could definitely <"account for the gill colour"> if there was any residual ozone, it is a really strong <"oxidising agent">. In some ways it is <"Canford Park"> all over again, just proving that you can have too much of a good thing. cheers Darrel
  95. dw1305

    45x27x30, ‘Apocalypse Now!’

    Hi all, That is very interesting, and why a picture is worth a thousand words. You can see the bright red gill colour, showing through the operculum, which means that you've had an issue which has affected oxygen uptake. Because you had just had a large volume water change it looks like the...
  96. dw1305

    45x27x30, ‘Apocalypse Now!’

    Hi all, That is actually one of the issues. I had it with Dicrossus maculatus, they were fine why they were growing, and ate absolutely everything. Being used to Apistogramma (which only ate live food, wouldn't eat Ostracods etc) it was a surprise and I got quite blase about looking after...
  97. dw1305

    45x27x30, ‘Apocalypse Now!’

    Hi all, That is a shame, hopefully the remaining ones will be OK. I avoid <"all the real black-water fish now"> they really need a specialist set-up, with softer water than I can manage, and very careful feeding. I'm hoping to get some <"more Apistogramma soon">, but I'm going to try and get a...
  98. dw1305

    Tigmon 80x40x35

    Hi all, Unfortunately it is back to the <"unknown unknowns">, every-one's tank is going to be slightly different. If you have very pale new leaves it is caused by shortage of a nutrient that is non-mobile within the plant, so that the plant can't move it to new leaves, and the two elements...
  99. dw1305

    Tigmon 80x40x35

    Hi all, It might be. You may have added enough PO4--- ions to strip any Fe+++ ions out of solution to form insoluble <"ferric phosphate complexes">. cheers Darrel
  100. dw1305

    To sump or n̶o̶t̶ to sump? (journal)

    Hi all, Nice, your Anubias looks very healthy. Which Chaetostoma sp. is it? Is it L455? I've never seen one that looks like that. cheers Darrel
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