bmkj02
Member
Okay, I have seen purple, green, red and brown algea. Now on my sand I see a black film. Just in a small area but its in a 24g aquapod with a 20g sump with a skimmer, UV and GFO reactor below. Have a mag 5 and a MJ 1200 with mod kit. I have stared at this till my eyes were almost popping out. Its black. Not a dark purple. Its a film that will break away if you touch it. What is it? I did a water check and its all 0 except for a tiny bit of Ammonia but that wouldnt do it. PH 8.0, Nitrate and Nitrite 0, Ammonia .15 or less, calcium about 600, Phosphate 0, O2 5mh, salinity 1.25.