Re: 90x75x45 optiwhite. spraybars!!
No idea troi, found the vid on you tube...
No idea troi, found the vid on you tube...
Whitey89 said:15 TDS thats ultra soft. Crystal Reds like the TDS between 100-180 ish.
If the water is too soft it will cause molting issues
Whats your GH & KH?
Couldnt the likely cause be unstable Ph swings?
Regards
darren636 said:i wonder how many fish inhabit water with such a low tds? I would say you need to raise it a bit.
Actually a lot of the water from the tropical rain-forest areas is lower than this in TDS. The reason for this is that the rain-fall is very high, and it washes any soluble salts out of the upper layers of the soil leaving only insoluble aluminium and iron compounds behind. These are the infertile lateritic soils you find through-out the tropics, any soluble compounds in the water tend to be humic acids and tannins from fallen leaves, these add H+ ions and sequester any other cations and depress the pH. Have a look a this travelogue <http://apisto.sites.no/page.aspx?pageid=120> for some water quality parameters (all the site is well worth a look as well).Cant imagine that there would be many? Given that a dissolved mineral content would be present in nearly every natural lake, river or stream.
Antipofish said:Iain, did you mean top up is 30lt per week or per day ? At 30lt per week I would say its not a chlorine issue given the volume of your overall tank. I have read many instances where people do 10% water changes or greater, without any effect. Just what I have read but no doubt there is someone who knows more so don't take this response as gospel.
Whitey89 said:15 TDS thats ultra soft. Crystal Reds like the TDS between 100-180 ish.
If the water is too soft it will cause molting issues
Whats your GH & KH?
Couldnt the likely cause be unstable Ph swings?
Regards
Antipofish said:Thats more likely with such low tds I would have thought Nathaniel. Good call.
I dont do RO water, but as a question to benefit Iain and others, when doing RO water, are you not supposed to add some kind of buffer back in ? I know I had to with marines, but that was because the water had to be a pretty high pH (around the 8.2/8.4 mark was what I aimed for). Surely to SOME extend that is still necessary ?
dw1305 said:Hi all,
Actually a lot of the water from the tropical rain-forest areas is lower than this in TDS. The reason for this is that the rain-fall is very high, and it washes any soluble salts out of the upper layers of the soil leaving only insoluble aluminium and iron compounds behind. These are the infertile lateritic soils you find through-out the tropics, any soluble compounds in the water tend to be humic acids and tannins from fallen leaves, these add H+ ions and sequester any other cations and depress the pH. Have a look a this travelogue <http://apisto.sites.no/page.aspx?pageid=120> for some water quality parameters (all the site is well worth a look as well).Cant imagine that there would be many? Given that a dissolved mineral content would be present in nearly every natural lake, river or stream.
The you need to "add salt" for soft water fish is also wrong and is based upon a failure of understanding of osmotic regulation, the addition of totally unnatural ions is likely to cause, rather than, alleviate stress. Have a look a this one if you want some actual figures, it also highlights the importance of natural humic substances ("black water") <http://www.ncbi.nlm.nih.gov/pubmed/12695983>
For various reasons you can ignore pH swings, these are inevitable in water with low dKH, and don't effect the fish. Have a look here for a bit more of an explanation. <http://www.ukaps.org/forum/viewtopic.php?f=51&t=20886&p=213484&hilit=buffering#p213484>. Very soft water is more difficult to manage than highly carbonate buffered water, but it isn't impossible. One thing is that biological filtration is reduced, so you need to keep on top of stocking rates and water changes.
Personally I would add some tannins to the water with Indian Almond leaves or Alder cones, and then as was suggested add a bit more hard tap water to buffer the water up (I would only go to about 50ppm TDS).
cheers Darrel