I agree Cyano. I had this problem also. i thing everyone gets it at some time. I had a high Oxygen level so I bought another Hydor pump and waited. They say that Cyano hates high flow but mine just started growing in others areas along with the spot it already was. So maybe raising your Magnesium will help. And as much as I hate to just add a " Quick Fix " to my tank I finally broke down and got some Red Slime Remover made by ChemiClean. And I have not seen it again. Also It did not hurt anything in my tank. So its really your call. |