i need some help.
after some recent deaths, im down to 4 cherry barbs and 7 harlequins. The harlequins seems to be doing fine now. They are very active, and eat at feeding. The cherry barbs, i'm concerned about because they dont eat when I feed them. They usually stay to the bottom of the tank. I'm feeding them Nutrafine Max and Tetra Spirulina and Dried Blood Worms. The Water Temperature is at a constant 80. I dont want to add any more fish until these stop dying. I'm thinking that they were already dying when I bought them. I have an NH3 tester in the tank at all times. I have two thermometers to make sure that the readings are accurate. What else could it be that are causing the fish to die. Not enough sleeping space?