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Thread: Green dot algae
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post #3 of (permalink) Old 05-14-2012, 11:14 AM
Denis Onii
Algae Grower
Join Date: Jul 2010
Location: UK
Posts: 9
Low PO4 seems to be a factor with GSA. The likely scenario is that the amount of PO4 you are dosing isn't enough for your lighting period. Either increase ferts or lower lighting.

Personally I would lower lighting to 6 hours for couple of weeks. If that eliminates the GSA then slowly increase lighting along with ferts until you get back to 10 hours.
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