What is an ideal Nitrate level - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 02-29-2008, 08:01 PM Thread Starter
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What is an ideal Nitrate level

What is an ideal nitrate level in a planted tank...I have a 20 gal, with 10ppm
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post #2 of 4 (permalink) Old 02-29-2008, 08:17 PM
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For fish and shrimp, around 0.

For plants, around 20.

So you found the golden middle! The more, the greener your plants can get. Certain plants turn nicely red with lower NO3 levels.

For high light tanks, you probably want to err on the high side, for low light you can go a bit lower.


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post #3 of 4 (permalink) Old 02-29-2008, 10:42 PM
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Actually, fish don't actually need a nitrate level of 0 as you can't keep nitrate level stay at 0 in a non-planted tank. If you test nitrate level in a non-planted tank, you found nitrate reading at 0, I would say there is something wrong with your water or your test kit.

Nitrate is not toxic, fish can do fine with high level of nitrate, i don't know how high, below 100ppm maybe. It all depends on which fish native to which environment.

I will exclude shrimp as I don't keep them before.


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post #4 of 4 (permalink) Old 02-29-2008, 11:03 PM
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Nitrate IS toxic to fish in high amounts. The suggested maximum levels for tropical fish is 40PPM. Some tropical fish require an even lower level.

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