I've had my BioCube 14 going for about 5 weeks. Last week I started to notice this brown stuff growing on my sand bed and on my rocks.
During the cycling of my tank, my
phosphates hit 4
ppm, so I added some PhosBan in a micron bag to the back
Sump area. (Last I checked, it was down to 0.6ppm)
At first I thought the brown stuff was the ferrous oxide (rust) from the PhosBan leaking into the tank. But when I changed the water and tried to siphon this stuff up, it was kind of sticky, and would come off in sheets, sort of.
I'm wondering, is this
cyano? Here's a picture, tell me what you think. And more importantly, will it go away, and if not, how can i get rid of it?
IMG_3532.jpg
Thanks for your help!
