Hello all, wanted to pick some brains....
Over the last month or so ive started to see a gha bloom, however it only grows on my glass, never on my sand or rock. This particular tank is a 20g with decent levels,
Undetectable phosphates, prob due to gha.
Lighting is a 120w taotronics led
7hours whites and 9 hours blues per day.
5g per week water changes and skimmed by a deltec mce300.
Tank age approx 1 year.
Does anybody have any idea why it only grows on my glass?
Thanks in advance,