Newly cycled tank

Tyler777

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Apr 29, 2024
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Menasha, Wisconsin
My newly cycled 125 gallons tank is having a little nitrites problem.
After finding a female swordtail dead this morning I decided to check the water.
The ammonia was zero bur nitrites were 0.25. I did a 50% water change nwaited over an hour to check the parameters again n the ammonia was zero again but the nitrites was 0.25 again.
Even after the water change.

Any advice ????. I already have another fish I'm the bottom with its dorsal fins down likewaitigto go.

I need advice.
 

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