Water change?

[sango]

My ammonia spike has passed, but my nitrites are still very high. Should I do a water change to get them down? My tank has only been in cycle for 4 days. One more question. If my nitrites do go should I do a water change anyway?

[stusclan]

I'd wait until the cycle has completed. If you are freaking out about your readings you could do a small water change, but I wouldn't. I've always let my cycle run the course.

[RMPD109]

Let it run its course then do a good size water change when ammonia and nitrites are zero. This will help reduce the builtup nitrates.

[aquafreak]

Unless there are fish in there, let it get real nasty and then start your tank. My ammonia has stayed near 0 since because a complete cycle was allowed.