Few weeks ago I had an outbreak of GSA in my planted tank, it is now disappearing but on the Seyru stones I am getting kind of red / burgundy color, velvet like coating. I thought these were either a dying algae or kind of remnants of BBA. But it does not die and it keeps slowly spreading?
Does anybody have a clue what this could be? I haven't found anything in the forum describing similar stuff, only one article describing an "orange coating" but this one is dark/rusty red.
I am dosing 80% EI, adding pressurized CO2, light is T5 6500K at about 55 PAR at the substrate, light is on for 1 hour gradual light up + 7 hours full strength + 1 hour gradual dimming.
Picture attached below.
Many thanks, any advice would be really appreciated.
Jan
Does anybody have a clue what this could be? I haven't found anything in the forum describing similar stuff, only one article describing an "orange coating" but this one is dark/rusty red.
I am dosing 80% EI, adding pressurized CO2, light is T5 6500K at about 55 PAR at the substrate, light is on for 1 hour gradual light up + 7 hours full strength + 1 hour gradual dimming.
Picture attached below.
Many thanks, any advice would be really appreciated.
Jan