Ok i have my 29 gallon tank up and running with live plants, 6 diamond tetras, 5 panda cory cats, 1 random cat fish that i call kitty fish, and what was 7 danios. So yeah i am keeping my tank up and running Ph is okay (6.9), amonia is 0 and every thing is right. And yet over the course of 2 weeks my daino population has gone from 7 healthy dainos down to 4 still healthy danios. I have checked the tank every day, feed my fish made sure the tank temprature is fine and i have seen absolutly no dead danio bodys. None. Zip. Zero. Dose anyone have any idea what could have happened to them?