Hi
Can anyone help me identify what is this brown color sticking on my glass and also any tips on how to get rid of them
My ammonio is 0ppm
Nitrite 0ppm
Nitrate 20ppm
Calcium 480ppm
Alkalinity 10dkh
Phospate 0ppm
I have two clowns and a yellow wrasse in my tank and a green polyp coral
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