The best way to get rid of cyanobacteria in a sand bed (normally where all the nutrients build up to start the outbreak) is to get a spider conch. I have tried red slime removers and had minimal success. The spider conch was able to clean my 75gal in 2 weeks (half the tank being sand bed). Now i have to feed him algae flakes, cause he eats to darn much. The rest of my clean up crew (5 blue leg hermits and 10 cerith snails) took it off the rocks in a mater of days. cyanobacteria outbreaks typically start from having to many uneaten or decaying nutrients in the sand bed (where most food falls) Stirring your sand bed will help your filter catch some of the decaying mater, but your best bet is to buy cleaners for your sand bed. I chose the spider conch over sand stars because you never see the stars and the spider conch is up during the day out in the open eating. As for people saying that you need more flow, its horse crap, i had it in my tank that has way too much flo. Its cause by having to many nutrients in your tank ( phos, nitate, and other nutrients). Also cyno likes any form of light. so you dont have to change your bulbs you just need to find a way to lower your nutrients (less feeding, skimming, adding chaeto algae to your sump, or buying sand stirrers that eat poo and decaying matter.