Lint in my low tech tank...
I just installed two dual sponge filters which I only did a quick rinse on both. So I'm guessing its from there and I do have a little too much light from my fugeray 30" for my 20L but I don't think its algae or mold because its constantly floating around. Does it eventually clear up as I do water changes?
10gal. - A lot of guppies, 3 otos, 3 albino corys, assassin snail, 3 ghost shrimp, java ferns
10gal. - 7 RCS, 3 TPFR shrimp, tiger nerite, zebra nerite, subwassertang, java moss, java fern, anubias nana