It’s not slimy, it’s dusty, but it’s really red and I can’t get a good pic of the color. I have had diatoms plenty but haven’t had an overall outbreak of cyano, I have had two spots of red in two different corners for months, turbos camp there forever at times. I know that has to be cyano. Recently I did a FE test and it said to dose some FE (Redsea colors), I am wondering if the FE sparked this. No other changes than that. But, this red dust is on a lot of stuff. It’s just different looking than the diatoms I have had in the past.