It's always potentially bad when you're trying to chemically alter the cycle, even with something like Prime. I agree with the other members who have posted about multiple daily water changes. If you are unable to do the changes, then you could try putting your guy into a clean QT just while you're at work or school when the nitrites are getting so high, then he can go back in when you've been able to do the changes to bring them back down to a more reasonable level. If you're worried about needing some ammonia during that time, you can add fish food, or you can purchase pure ammonia at the hardware store. :) This will help you finish your cycle *and* keep your fishie safe. :)
Okay, I didn't read to the end of the thread before I posted this, but it sounds like you're cycled or almost there, so never mind! :) I've heard of cycling taking a week to months...it just seems to depend on the tank and the fish and some other nameless faceless factor that no-one can quite seem to identify. I'm thinking the cycling gods. ;)
Last edited by Blue Fish; 04-10-2013 at 10:35 PM.