I was wondering if I could use nitrates to tell if I'm overstocked or how many more fish I can have in a tank. Like add fish gradually so there isn't ammonia and just look at the amount of nitrate to see if I can safely add more.BluMan1914 said:Most will say up to 40ppm is fine.
If you are doing regular maintenance, nitrAtes should not even be a concern.
I'd say 40ppm as anything higher would probably start killing inverts. When my water hits anything above 40ppm I know its wc time. If you have little to no nitrates in your tap and you have plants I wouldn't worry at all.Mii said:
I'm pretty sure nitrate shock was disproven, but I could be wrong.jdhef said:Apparently there are many member here in the UK who have 40ppm of nitrate in their tap water, so their nitrate is never under 40ppm. While you want to keep nitrates under 40ppm if possible, I think the bigger problem is large swings in nitrate levels. Like for example if your tank had a nitrate level of 100ppm, your fish may adapt and be doing fine, but then a large water change using water containing 0ppm of nitrate would bring the nitrate levels down so (once again, for example) 10ppm. That would be dangerous to your fish.
So if you have 0ppm in your tap water, and kept your nitrates under 40ppm, a 50% water change would only result in lowering the nitrates to 20ppm, which fish can handle.
I don't think it's been studied but nitrate can reach levels where there's many more nitrate ions than those that determine water hardness. That might result in osmotic shock if a water change is done too quickly.RomanNoodles96 said:I'm pretty sure nitrate shock was disproven, but I could be wrong.