i was reading an articlt in "ask jack" from like 1993 and he says that white stringy doodie is the sign of sickness so i looked at my fish and sure enough white stringy doodie i thought it might just be the food i feed mysis shrimp large white freshwater shrimp (more protien than brine shrimp brine shrimp 5% mysis shrimp 68%) any one out there know because i don't want to put these ones into my system unless they are completly healthy.