09-19-2010, 05:19 PM
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Originally Posted by Byron
From the photo it doesn't look bad, and appears to be diatoms (common brown algae); I assume it easily comes off with your fingers?
Some more info would help. How long has this tank been running, what size tank, what is the light (be specific), and what fertilizer(s) are you using? The substrate looks like sand so I will assume it is not enriched (no plant substrate under it, or soil).
It comes off easily with my fingers.
It's been running a year if not a little more.
15 Watt @ 5500K
Seachem Flourish @ 2xWeek