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- Feb 7, 2017
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So my tank is currently in the cycle. What confused me is my nitrites are high and nitrates are going down. Isn't it supposed to be the opposite?
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Are you developing algae, or have any form of algae export going?
I have this on my sand and rocks
Seems like you're in the middle of getting things established, just needs more time. Did you have a high ammonia content when it started? The algae is just the start of a Diatom bloom it's normal in new systems, that should also die off once things level out.
That looks like the beginnings of diatoms, which would be expected (and are a good sign) in your ongoing establishment of the ammonia/nitrite/nitrate cycle.
Tell us about the tank and setup? Size? Sump (yes/no) How did you start the cycle?
220 gallon yes there is a sump. Started it with shrimp