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How toxic is nitrates??
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Joined: 27 Sep 2004
Location: Brisbane, Australia

PostPosted: 2005.04.16(Sat)22:28    Post subject: How toxic is nitrates?? Reply with quote


just a quick question

how high can nitrate levels rise till they are lethal to fish.

my levels can rise up to 30ppm is this still safe??


150litre amm 0, trates 10ppm
2 clown loaches, 2 gouramis, 4 corys, 1 rainbow shark, 7 silvertip tetras, 2 gold rams, 2 bolivian rams, 1 bristlenose
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Joined: 14 Feb 2003
Location: New Jersey

PostPosted: 2005.04.16(Sat)23:42    Post subject: Reply with quote

30 isnt too bad. Thats about as high as you want it to go for most fish however. Even a bit higher probably wouldnt kill a fish outright, although it could compound other problems.

Edit: Rams... best to stay below 30 at all times. Funny buggers, I wouldnt risk higher.

Alternate case study: Convicts bred and raised fry with the nitrates over 100 Surprised But convicts arent exactly rams.
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Joined: 05 Dec 2004
Location: new york, ny

PostPosted: 2005.04.17(Sun)4:43    Post subject: Reply with quote

I would argue that with Rams, especially Blue Rams, you want to keep you nitrates below 20 ppm. Most South American Dwarves are very sensitive to nitrogenous wastes, so as low as you can reasonably keep them is best. As a general rule, I strive to keep my nitrates in the 10 to 15 ppm range (I have rams).

Directly speaking nitrates don't become toxic until 40 ppm, but still, I would avoid anything above 20.
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Filtration Master

Joined: 30 Jan 2005
Location: New York

PostPosted: 2005.04.22(Fri)18:29    Post subject: Reply with quote

Nitrates as high as 40 is I'd say the absolut max, but at this high it still can cause problems, especially algae, and diseases. This is the main cause of water quality-disease issues. In my Marine tank my nitrate is 0 ppm. But the nominal rate for most FW Tanks
85 Gallon Marine Tank
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