JennM;779049 wrote: UltraLife Reef Products Red Slime Remover runs circles round ChemiClean and it won't crash your tank....
But having said that, I agree with the others that suggest that a chemical fix is a last resort.
What are your parameters? Tank size/age? Type of lighting and age of lamps (if applicable).
How many fish and how much/often do you feed?
First step to solving the problem is discover the source and address that.
All the chemicals in the world won't keep the problem away, and in fact if one attempts a chemical fix with poor water quality to start, it can be a big risk to tank inhabitants.
Jenn