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jazzlvr123 · 05-11-2008, 12:43 PM

two things contribute to GSA low phosphate and high light/ too long of a photo period. they do not sell phosphate at petsmart or petco. what you need it mono potassium phosphate you can order it at www.aquariumfertilizer.com

05-11-2008, 12:43 PM	#5 (permalink)
jazzlvr123 Senior Member Join Date: Apr 2007 Location: Boston, Ma Posts: 1,404 iTrader Ratings: 62 iTrader Positive Rating: 97% Plant Points: 78850	Re: GSA (Green Spot Algae) two things contribute to GSA low phosphate and high light/ too long of a photo period. they do not sell phosphate at petsmart or petco. what you need it mono potassium phosphate you can order it at www.aquariumfertilizer.com