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Originally posted by Roland Jacques
FWIW I still think the mag sulphate is the answer here. I did talked to both Sea Chem and Kent employees and they both said the vast majority of ingredients is Epsom salt in their Mag sup. Remember Mag Chloride had little to mostly no effects on this algae.
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Well, this may put a crimp on my salt mix theory. The Advanced Aquarist article shows that marine salt mixes have sulfate levels that are far below those of natural seawater (904-928 ppm). The salt mix with the highest sulfur level is Oceanic with only 70 ppm. This is less than 8% of its level in natural seawater. Of course, it would help if we understand how magnesium sulfate works against bryopsis.