I have a problem and I'm not sure on how to post here. My 45 gallon aquarium has been cured of ich. I did 50% water changes and sometimes 75% water changes with Quickcure for 13 days. The problem that I have now is that everyday when I check the water after work, the ammonia climbs close to .25. The nitrites are an zero and the nitrates are close to zero. I am using Amquel Plus and Nitrasorb to try and keep the levels non toxic. I have 5 little goldfish in there, 4 big danios, 8 zebra danios, plus a pleclostomus. Can I get the tank straight again? If anyone has any advice I would be very happy to hear from you. Did I wipe out the biological filter? I'm overstocked with the fish and I really don't want to lose them.