Cyano and LEDs?

[Enigma]

Originally Posted by MarkoD

also another thing you have to consider is that phosphates can be absorbed into sand and the rock. GFO and other phosphate removal media only removes whats in the water

And, being that I use dry rock (the equivalent of a phophate bomb), I think the issue is compounded. I think that issue is mostly resolved by this point, as the "new tank" gha disappeared from the new rock about mid-August (I think).