Excital effectively gets rid of cyanobacteria. Cyanobacteria (red slime algae) often arise if the water temperature rises, sometimes in combination with a high level of organics in the water or rotting bottom material. Excital is easy and safe to use and is harmless to fish and corals. If there is a serious infestation, then it is recommended to first remove the cyanobacteria by hand as much as possible and then add Excital. If there is a serious infestation, the Excital treatment can be prolonged for a few days, even with a double dose.
