Thanks guys! Yeah I have a water testing kit. yesterday my ammonia was at .25 ppm but I read a article about ammonia and it said that your carbon filter pads can hold on to some ammonia so I cleaned my carbon pads out. Today the ammonia is .25 ppm, nitrite 0 ppm, nitrate 0 ppm, ph 6.0. Could I get lyretail killi fish in my tank? Maybe a pair? They sell them at my lps for 15$ a pair