for a weird reason my royal plec and lepord died the other day, the water paramiters are normal and the heat was gradually lowered back to 76 degrees, there is no visible sign of what happend to the poor little guys. I want to replace them but I dont want them to die either (royal plec was 22.99 and the lepord was 38.00) and in my other tank my Rubber plec died. I am sure that they are eating. they get a blanched zuccini every week and there is some alge and driftwood in the tank if they desire, they also went for bloodworms too. I just cannot understand why it's happend.. Any ideas?