i don't think this is algae but nobody responded in the general discussion so maybe somebody here can help. can anybody tell me what this is/ why i have it/ how i can get rid of it? my tank is about 2 1/2 weeks old. i had been doing regular water changes and adding nitrifying bacteria as a stretched out the water changes. the tank has some mosses (flame and another), bacopa and baby tears. this began shortly after introducing bacopa and baby tears. lighting has been about 6-8 hours a day. since contracting this i have dramatically reduced the lighting time. help please.