Be careful with red slime removers, most are a Erythromycin which is an antibiotic and can kill other forms of bacteria.. The best way is to control algae is by controlling phosphates and detritus in the aquarium. Problem with things that kill algae or bacteria is it does not solve the problem, it might kill the algae or bacteria but once introduced again you will have the same problem or another algae just takes it's place eventually. Cyanobacteria is in almost everyone’s tank even if you don’t see it and will be introduced again when buying or trading a coral.
Same with turning off your lights… Take care of the problem. Turning out the lights just adds undue stress to your corals.
Solve the root of the problem or you will have worse problems down the road. People need to stop looking for easy fixes and learn about the biological process that are happening in your tank so you become a better reefer and can handle problems down the road. This is the reason there has become a major trun over and most people in hobby drop out after a few years. By the way this was not aimed at the origional poster but all the algae threads and other thread about other problems.
Dave Polzin
Same with turning off your lights… Take care of the problem. Turning out the lights just adds undue stress to your corals.
Solve the root of the problem or you will have worse problems down the road. People need to stop looking for easy fixes and learn about the biological process that are happening in your tank so you become a better reefer and can handle problems down the road. This is the reason there has become a major trun over and most people in hobby drop out after a few years. By the way this was not aimed at the origional poster but all the algae threads and other thread about other problems.
Dave Polzin
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I totally agree that it could be from top off water too. There was a time that I ran out of RO/DI water and had to use "tap" water to top off. I know it was a terrible idea but at that time it was the only choice I had. Anyway, within a few days I started to have different algae blooms.

