Nitrate Got To 20

qchris87

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Doesn't have to be slowly. 0-20 ppm (IMO 0-40) doesn't have much affect on fish when doing water changes. I wouldn't worry about it.

How long did it take for your nitrates to get to 20 ppm?
 

Tony M

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Nitrate level at 20ppm is not a problem. I would consider 5 to 20 to be great. Dangerous levels don’t start until you get 60/80. Ammonia and nitrite should always be zero but the result of that should be some amount of nitrates.
 

Lorekeeper

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Sounds like you might have a bit of a misunderstanding of "parameter shock".

Ammonia and Nitrite should both be 0, and nitrate should be under 20, in most tanks. However, doing a large WC to lower any of these values will NOT result in any shock, IMO. It's better to have a lower nitrate level suddenly than to have high nitrates that are slowly being lowered.

Now, PH is something a bit different. You want PH to be as stable as possible. Jumps in PH will cause pretty bad stress.
 

Lorekeeper

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Same thing. As long as the PH is the same, and temperature is pretty close, don't worry about it. Shrimp will be especially susceptible to nitrates.
 
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