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Yep I used them for years, only switched to an inline diffuser so get more kit out of the tank. I was running a nano diffuser on my 250lt as well, so that one should be fine. I would suggest getting two so you can clean one whilst the other is in the tank (they are also very easy to break!) Sam

I've used one from AquaticMagic, its the one in my DIY disposable co2 guide. Seemed to work ok at the time. http://www.ebay.co.uk/itm/CO2-Needle-Va ... 4ceb79411b Sam

Ive had two lunapet regs and both were excellent, I wouldn't hesitate to recommend them to anyone. Sam

How big is the tank? You might not need a 2kg FE is my thinking. If money is really tight, do away with the solenoid, running co2 24/7 hasn't done my tanks (or fish) any harm as far as I know. Sam

2 months seems about right. Have you tried submerging the lot in a bucket of water to check for bubbles? It shouldn't damage the reg as this is how i first tested this kit.

Not using it on an FE but I have got it on a large pub co2 cylinder. You need an adaptor to get it to fit which no one seems to be doing anymore.

Aquaessentials used to stock it and aquatics online, Charter House also i think. You're looking for a D&D thread convertor. Sam

There is a convertor that goes from disposable to refillable cylinders (increasingly rare), but not the other way as far as I am aware. Is this the kond of reg you mean? http://www.toolbox.co.uk/sealey-gas-reg ... GoogleBase Sam

Im gonna move this to the CO2 section as its getting away from buy/sell/swap :) Sam

You can but it's not necessary in my experience. Some poeple like to de-gas the co2 to give the fish a break from it, but healthy plants will be producing lots of O2 so the wont be a shortfall. Sam

I've had several screens come off my regs over the years, but it never seemed to affect the way it worked. One of the needles also stopped working and that didnt seem to matter either. Sam

Hi Matt, You are right about the older JBL regs not fitting properly. From memory it was necessary to sand down the first few threads on the cylinder in order to get it to fit, I assume so that it fitted further into the reg connection. I've not dont it though but people used to say it...

Charter house and aquatics online used to do them but I cant even find them in their sites now. Sam

Cheers for letting us know, I too had thought it was 2 euro's so worht know its more. Sam

JBL do a cone stand, or used to at least. I have also seen people use those water bottle holders you get for bikes, like this. http://www.chainreactioncycles.com/Mode ... tedKingdom Sam PS - I dont know if that holder I've linked to would work, its just to show you what I mean :) you've have...

Fair enough :) in that case I'd go for an inline diffuser, but if you put it on the intake it'll dissolve a lot more co2, as it'll get taken around the filter first. Sam

Why does it matter how big the bubbles are? As long as you're getting the correct co2 level in the tank, bubble size is almost irrelevant. Sam

Right I see, you dont have to turn the co2 off at night, just elave it running, although I know several people like to anyway :) Sam

What do you mean by atomiser? Inline or diffuser? Sam

You don't need the ball valve that whats the needle valve is for :) Sam

Looks the right size to me :) Sam

For the hassle of it, I just buy my 4dKH water, a bottle lasts ages anyway :) you're also going to struiggle to get it accurate enough using home KH test kits. Sam

Yep should be able to :) Sam

As mentioned, on a 350lt tank you'll soon be wanting refillable co2 cylinders, 600g aint gonna last very long! The thread size on FE, pub cylidners, even the aquarium co2 cylidners is a stanadrad size so the regs and cylidners are interchangable. If it fits a pub cylinder it'll fit an FE and...

Given that many ppople just have the diffucer in the corner of the tank and get good diffusion anyway, I doubt you'll notice the difference between the various options. You could also just push the end of the co2 tubing into the fitler intake and the bubbles would get sucked in that way...

Or one of these taps http://www.midlandwaterlife.com/inlineh ... -1185.html Sam

How about the tetratec 600 or even 400? They'd be ok on a 25lt I would think.

How big is the cylinder you'd be using? If it were me I'd go with whichever is cheaper, as unless you're planning to use those tiny co2 cylinders, then a cylinder (600g and bigger) will last you yonks on a 25lt so you'll bearly notice the difference if one system is slightly better at diffusion...

Also worth giving the DC a washout with the 4dkh water and then putting fresh stuff in. I used to clean with tap water and it left a residue that threw the whole thing out colour wise. Sam

Machine mart is the best place I found for disposable cylinders, if you're able to order a few, even with postage its still cheaper. Sam

That looks like it would work, but take a cylinder with you when you buy it and test it out, Halfords are generally quite good about letting you see if something would fit. Sam

I know postage adds £20 but an overall £49 for a reg aint all that cheap. I would think it would have meet certain standards in order to be sold in the UK, so it should do the job. Sam

For the money, there are only two advantages to these mini kits that i can see; size and very fine adjustment of the co2 rate (I would assume I dont have any personal experience of them). The size and space saving they offer might be useful for some. I also used a disposable cylinder based kit...

No they don’t, as the refillable cylinders have a very much larger thread than the disposable bottles. You'll need to get an adaptor, but I'm not really sure if there is one to go from refillable to disposable. Sam

Check out the thread out it :) http://ukaps.org/forum/viewtopic.php?f=37&t=4258 Sam

Its fair to say the bigger the cylidner the cheaper the co2, but I like the compact nature of this kit :) Sam

Nice, I always wondered if this was possible :) Sam

Cant comment on the rush of co2. but those extra bits should all work ok :) Sam

Try eBay, its full of cheapo glass diffusers, like this one. http://www.ebay.co.uk/itm/CO2-Nano-Glas ... 2563566a2f Sam

I doubt you'll get a pressurised cylinder through customs, so might either be worth checking or just buying everything else. The most important part and most expensive part in the UK is the regulator which you could probably pick up cheap out there. I would get a two gauge reg with built in...

This kit would still work, you just need the adaptor to convert from disposable to refillable cylinders. http://www.charterhouse-aquatics.co.uk/ ... -2438.html THis is what I'm using at the moment :) but the FE kit might be better if you can. I must admit I would prefer a reg with a gauge...

I gave up using non-return valves, I never found they worked. Turning the co2 off in my experience always caused a bit of water to flow back up into the tubing, never did work out why though. Providing the water doesn't reach the reg it's nothing to worry about, it'll get pushed back into the...

I wouldn't worry to much about the reg not giving enough pressure, once the atomiser is attached if the pressure behind it isn't enough it'll just build up until it is :) I really don't think you'll have a problem :) Sam

Luuving that!

Ask! I dont think any will do FE's but some stock 2kg bottles which are then refilled. Just a thought as might just make life easier if getting an FE refilled proved problematic :) Sam

Ask for co2 in the MA shops some do refils :)

It'll cost you much the same whatever kit you go for, might as well get a big one ;) An FE would last 6-8 months if not a year on a 12" cube :) Sam

A bigger system doesn't necessarily have to cost more, check out either of my DIY Co2 kits. http://ukaps.org/forum/viewtopic.php?f=34&t=266 http://ukaps.org/forum/viewtopic.php?f=37&t=7696 I dont know of any cylinder that will fit the 88g Fluval reg, which seems to have a bespoke thread...

Should last a good few months, 4-6 I would think. Sam

I used a few of these over the weekend on the Holland trip. The build quality is first rate and the needle valve is excellent, ideal for a nano as it allows very fine adjustment of the bubble rate which is what you want. My only hesitation about them is the 88g cylinder, which on your 12" cube...

I wouldn't necessary recommend it, but I used to have my 600d disposable cylinders laying flat as where wasn't room when it was placed. Having is diagonal I don't think would be to much of a risk, but its up to you. Sam

Coiln & Rudi - leave it people, by my reading this seems to me to have been a simple misunderstanding of the use of 'smart blahblahblahblah'. Either way, no need to let it boil over into the thread, please. I will add that the old JBL regs were renowned for not properly fitting anything, but the JBL...

Nice one :) You'll need some kind of needle valve to be able to control the very fine adjustment of the bubble rate, something like this. http://cgi.ebay.co.uk/CO2-Needle-Valve- ... 4ceb79411b Sam

Sounds v odd, guess you could try adding lots more tape? I mean loads, to see if that helps? Re the 3.5 bar, I wouldn't worry to much about that, a leak wont lower the pressure the reg shows. I would guess that the max achievable pressure produced by the second stage of the reg is just 'set'...

;)

Heres a more similar one http://cgi.ebay.co.uk/New-Plant-Aquariu ... 563fb5d459 Pretty cheap so might be worth a try.

Really just a variation on a theme, but cant see why it wouldn't work. I've seen a similar kind on thing from our east Asian eBay seleers. http://cgi.ebay.co.uk/High-Quality-Aqua ... 4154175222 Sam

The only thing I would add is that I found this needle value to be a bit tricky at the lower end of the bubble rate. The difference between sufficient and too much Co2 in my 30lt cube was minute and I managed to gas a load of my fish and shrimp, so probably better to use this on slightly larger...

Basically all you're doing is swapping this bit for this bit And then just push the co2 tubing into the blue part. The other end of the co2 tubing connects directly to the diffuser. Sam

I'll add a link to this in my CO2 guide. Sam

Cant say Ive used it on any of my systems and never had a problem, or at least one that would have been sorted by using it. I agree with Stu in that the seal is created by the O-ring, the thread is just there to hold it all together. Sam

FWIW I run my disposable cylinder on its side and haven't had any problems in over a year :) Sam

Dont know of anyone that uses this type. My only thought would be how easily can the co2 rate be controlled? Does a higher 'bubble rate' using this diffuser mean more co2 passes through the membrane? Sam

Yeh even the ones I've got in broad daylight haven't got algae on the ceramic disk as yet. Would think the CO2 gas would keep it too dry? Sam

I can say I've never cleaned one of mine! One of the big advantages of inline I think is that even if the bubbles are bigger they get more time to dissolve, even if attached to the filter outlet. Its also never going to clog completely due to the pressure of the co2. Were I going to clean it...

The advert shows it with a 22mm female connection so I would think it's for refillable cylinders. Cheers all the same Sam

I'm looking for a new regulator, and have looked at the compact ones several times, like this one. http://cgi.ebay.co.uk/Aquarium-Fish-Tan ... 230db03336 Just wondered if anyone has used one and if they have a built in needle valve or not? The main knob on the top I assume is just to open...

Think you answered your own question here :) Ok the with lower water the CO2 should go up, but as far as I remember it is really the stability of the co2 rather than the specific amount. No one is ever going to achieve exactly 30ppm after all. Also, and I should have said this, but as the...

Simple question really; Could evaporation cause a CO2 instability? Before I put a cover on it (partly to test this question), my 40lt used to lose c.5lt a week and has been atrocious at growing plants since I set it up a few months back. Could the loss of what amounts to 12.5% of the water...

Yeh the Boyu one. As far as I can find, it is only available to fit 16mm hose though. Sam

Everyone that has them raves about them, they are readily acknowledged as better than the other often used (and the one I have) inline diffuser from hong kong. I haven't used one myself, but they do as good a job, if not better, than nearly all other diffusion systems. Sam

Thought so http://cgi.ebay.co.uk/Up-aqua-CO2-Atomi ... 3a5ce9081a Although I dare say you could find it cheaper if you hunt around. A few people sell these. Sam

I think the UP inline atomiser on ebay can be bought to fit different pipe sizes. Sam

Cant say Ive tried it, but dont see why it wouldn't work. Sam

Pubs sometimes use a short stubbly co2 bottle like these, but I've never found somewhere that sells them. http://www.chorleybottlegas.co.uk/userf ... inders.jpg They might be a bit big still, but worth a look. Sam

That's a novel idea, esp if you add excel anyway. Alternatively I just put some neat bleach onto the disk and leave for 5mins, then rinse off. Sam

I think that is the biggest flaw of inline diffusers -> cleaning them. I did soak one in 50:50 bleach once but its impossible to know if its had the desired effect as you cant see into it! Sam

Not used one myself, but thats a very good bubble coounter by all accounts. Sam

This one http://cgi.ebay.co.uk/Aquarium-Marine-F ... 5d298c35fa It not supposed to be as efficient as the UP one, but I always found it to go a good enough job. One tip if you get this one, put the co2 tubing on first and then the filter tubing, as its a right sod doing it around the other...

Lots of people rave about these diffusers. I've got the other cheapo inline type and personally I think they are by far the best for Co2. It gets the diffuser out of the tank and you get very good diffusion. Sam

Definitely, why pay for something you'll never use again. Sam

Cool I didnt check, lazy sod that I am! :lol: Sam

Coolio, CO2 is probably a help on any tank with plants. If you don't mind turning it off, then go for it, it wont explode, what do you think was holding the co2 in the cylinder when you got it ;) but equally just leave it running if refils are that cheap! Sam PS - there is a thread in the...

Why not, its no different to getting a shop kit, which you'll have to assemble when you first get in anyway :) Either of these kits would work, but the FE based one would be cheaper in the long run. viewtopic.php?f=37&t=7696 viewtopic.php?f=34&t=266&p=1515#p1515 If you do want a shop kit...

I very much don't that its giving the tank enough CO2. Either that or its a low light tank, in which case the co2 level doesn't need to be nearly as high, so they can get away with a very low bubble rate and make the cylinder last much longer. Where they measuring the co2 level in that shop...

It is a low light tank, you probably wont need ferts or even Co2. If you dont want to make up ferts, these dry powers are excellent. http://www.fluidsensoronline.com/zen/in ... 3_65_69_75 The only alternative to a solenoid is to manually turn the CO2 off, which is going to be a PITA! running...

That kit is definitely going to be too small then :) Sam

I haven't used one, but Ive seen it and it looks like a good bit of kit. However, what size tank are you planning to use it on? If its anything more than 10lt, yes ten liters, than it's going to cost you a fortune to replace the cylinders as they are only 95g and I use 600g of co2 in 5 weeks...

I only put the warning to cover myself. But really just think it through, is there any difference between a 2kg cylinder with JBL marked on it and a 2kg FE? No. FE's are everywhere, you'll have some at work, even if you don't notice them. They HAVE to be safe for that reason alone! Don't be...

Try this tread for refils http://www.ukaps.org/forum/viewtopic.php?f=4&t=4612 Also, that kit is good, but you could DIY a kit for less if you're willing to shop around :) here's a guide, which actually uses a lunapet reg. http://www.ukaps.org/forum/viewtopic.php?f=34&t=266 Sam

Just wondered that was all :) the bubble rate for a given tank depends on loads of factors. 2bps might not be enough that was my only thought. Is it a high light tank? Sam

How big is the aqurium? Thats more of a factor :) Why do you say 2BPS max? Sam

I've run several systems to empty and never had a dump. Maybe thats just me, I know people have experienced it. The only thing I have noticed is that as the cylinder gets lower the pressure goes up so I get an increase in CO2 in the tank which I have to be careful of, not that its ever caused...

If you're got the space, what about using one of those large pub co2 cylinders? That's what I use and again the JBL reg you have should just screw straight onto it. These might be easier to come by and it only costs me £20 to get mine refilled. Might be worth asking in your local pub if they...

Any branded kit is always going to be expensive compared to a DIY kit, so check out these guides :) they'd be just want you're looking for. I've got the disposable welding cylinder kit running on my 60lt and its quarter the price ;) viewtopic.php?f=34&t=266 viewtopic.php?f=37&t=7696 Sam

Outlet, every time :) Sam

Any normal plug in timer should be fine, like this one. http://www.homebase.co.uk/webapp/wcs/st ... xt%3ETIMER Sam

Cant say Ive got one, but probably works ok. Going to be pretty ugly in a tank though I would think. The glass diffusers work just as well when positioned below outlet of a filter :) Sam

Yeh I got mine from my local Go Outdoors place. http://www.gooutdoors.co.uk/ Sam

Sorry to hear about you losses. Thought that I'd add, that I've never experienced a CO2 dump, even with my cheap 600g disposable system and I've let the bottle on that system run to empty. On a 30lt it is always going to be difficult get the co2 spot on as the difference between enough and too...