Red slime Vs. Dinoflaggelates (sp?)

[banditpowdercoat]

You tried Lights out method? I have been fighting Dino/Cyano. Acctually thought they are the same? But mine is stringy, seems to increase in higher flow areas too. Also cant grab it at all. I cover tank once a month for 2 days, and sand is brilliant white. Starting to reduce now, hasnt come back like it used to, just a couple small patches