Good luck mate! Like i mentioned, i gerni'd all the badly affected rocks and then started to run Rowaphos to draw Phos down. Even after this i still saw some growth but this growth was from what @ReeferRob said is still stored in the rock. This is a photo o before i gerni'd it..
So there is a way back, i have none of this hair algae remaining... It took 1L of Rowaphos and two months to get all of it.
So there is a way back, i have none of this hair algae remaining... It took 1L of Rowaphos and two months to get all of it.