03-20-2010, 12:32 PM
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This same question was asked in your other thread, so I'm copying my earlier response from there, with revisions below it:
Does the "brown" wipe off the leaf with your finger? If yes, it is brown algae, more correctly known as diatoms. But if it is the actual leaf that is brown, there is an imbalance between light and nutrients.
22w of 6700K light over an 8g is a fair bit of light; how long is the light on each day (it should be close to the same duration every day)? And are you using any liquid fertilizer yet (you don't mention any)?
Now that I've seen the photos, you can forget the algae issue, it is the light/nutrients issue. And you said no ferts. So, I would suggest using a comprehensive liquid fertilizer to provide the nutrients the plant needs. If that works, fine; if not, the light will have to be reduced. Good ferts are Seachem's Flourish Comprehensive Supplement for the Planted Aquarium and Kent's Freshwater Plant. These each make several products, ensure it is the exact one. If you can't get these and want other suggestions, let us know. Byron.
Last edited by Byron; 03-20-2010 at 02:59 PM..