I have cyanobacteria

[Holygral]

using products like red slime remover, is just a bandaid, it only covers it up. You have to correct the condition to really get rid of it.

 

[Gvillboy]

I used red slime remover and it worked wonders for me. I only dosed half of the recommended dosage though. Two days it was gone. My fish and coral where all fine. I did a 50 percent water change and added carbon. I also cut my my photo period down to about 6 hours. My white lights were only on for 4 hours and haven't seen it since. It's just a stage your tank goes through but if you keep up with your water quality, from my experience, it won't come back.

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[jeffaquarius]

I agree with the majority but why minimize surface agitation and turn the skimmer off?

A temporary reduction of oxygen and light will have appreciable effect on red slime bacteria. The beneficial bacteria can survive without light