Quote:
Originally Posted by Tom Barr
GSA is a PITA and I'm glad I no longer have to deal with it.
Still, it's a two cause algae.
CO2 and PO4.
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When you state PO4 as a cause, you specifically mean a lack (or low enough to inhibit growth) of PO4 correct?
Quote:
Originally Posted by Tom Barr
I think there might be another method also to get rid of it over the longer term also.
But the above does work over a wide range too.
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What is the other method you are eluding to? I know when it is on the glass you can wait a few weeks and then clean it off. Is there another method for it when it appears on plants?