Hi Folks!
I just wanted to thank every one for all their help and to let you know the details of how it turned out.
We bought a PUR filter, but that only helped the ammonia level a little bit, so we had to use the ammolock anyway.
I started thinking back to what went wrong - all of my biological filtration must have gotten zapped when we added some new fish. While we were acclimating the new fish, the bag accidentally sank into the tank. I didn't think much of it at the time because the fish were coming from a reputable source, what I should have realized is that they were treated with ick medication when they were placed in the bag (standard practice for my LFS).
Anyway, I bought a third filter (another Fluval 304), replaced my bio wheels, and started doing daily water changes relying on Stress Zyme to kick start my biological filtration. It WORKED!!! We stopped feeding our fish completely, some days we had to do two water changes, but we didn't lose a fish. Within two weeks our tank and fish were happy and healthy. We even have an algae bloom just starting so things are very healthy for our beautiful fish.
Thanks again to all that helped. You all know how devastating it is when those water readings just aren't right.
Jessica
