What is the cause or reason for less than crystal clear water? Mine seems a bit cloudy right now. Not so much from the front, but when you look through the tank on the side, it is cloudy. Also, I put in a cleaner shrimp this morning and two hours later he was dead. The tank is established and water params are good. amm=0 nitrite=0 nitrate=0 pH=8.1 temp=80 phosphate=.5 Any ideas?