Hi, Thanks for the quick response. The fish have been in the tank for 2 1/2 weeks. the shrimp for 2 weeks. they seems fine. the shrimp has even molted. Yesterday my am was at 0.0, ni2 was .50, ni3 was .10 . specific gravity is at 1.023, and ph was 7.8 . today am is 0.0, ni2 is 0.0, ni3 is...