Ph is 7.2 but ammonia is high at 6-7. I have used amquel to lower it. I have done three water changes due to the high ammonia. The other fish I have include...5 Tiger barbs, 7 neon tetras, 1 bala shark, 1 rainbow shark, 1 catfish, and 1 pleco. Water temp is 76.2. I have great aeration, but like...