FWgal: I used biospira to take care of a small spike I had after moving my tank and taking out my UGF
. Overnight, it took care of the nitrites, but it took a little while to build up enough bacteria to take care of the ammonia. I have a feeling that biospira works perfectly when starting from 0 ammonia, but takes a while to catch up to an established amount of ammonia. Still, a lot faster than just letting nature take its course with my ammonia spike!
I think you're on the right track. Just keep an eye on everything, and keep changing water to keep the fish comfortable. I wouldn't vacuum the gravel though to let the bacteria you introduced to have a chance to latch on.
- and good luck!