Been noticing this stuff getting worse over the last 2 weeks. Done a 10g water change 2 days ago using aquaforest Reef salt. Salinity at 1.025, 79f, ammonia 0, nitrite 0, nitrate 0, calcium 400-420, phosphate undectable. It's a 29g tank with a 4x39w t5 with 3 blue+ and a actinic running 8hrs. Not sure what I'm dealing with as it looks like hair algae but is not even the slightest bit green as you can see. Picture taken with lights off to avoid color distortion from blue lights.