Olga
Aquarium Advice Newbie
Hello! I have a 75-gal tank that has cycled by Thanksgiving. Soon after we bought 10 fish and waited 3 weeks. Everything looked good, so we bought 10 more fish about a week ago. Right now we have 19 fish (6 glow tetras, 4 molies, 3 guppies, 3 ghost catfish, and 3 catfish). I have a Penn Plax Cascade CCF3UL Canister Filter For Large Aquariums and Fish Tanks – Up To 100 Gallons. After I added my last fish, ammonia went up to 0.25 ppl. I thought it was OK until my guppies started to die. I vacuum gravel once a week and change about 25% of water at the same time. In the last week, I changed water 3 times to try to bring ammonia down, but it's still at 0.25. I keep on adding AmmoLock to protect my fish, but I can't do that for too long. I reduced feeding to once a day instead of twice and I give them as much as they can eat in 3-5 mins. What should I do? Keep on adding ammoLock until BB increases sufficiently or add something to the filter? How long do you think it'll take for the BB to grow? Thank you for advice.