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Old 09-07-2006, 11:20 PM   #6 (permalink)
Laith
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I've never used Excel on thread algae but I'd say you'd get better results (if Excel does have an effect on this stuff) by dosing it daily, perhaps daily at 3x the standard dose.

I'm pretty sure I remember Seachem saying that Excel breaks down relatively rapidly once in the tank.
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