Alum is widely recognized as a great way to reduce phosphates and
create crystal clear water. Alum is aluminum sulfate, when the aluminum
ions bond with the phosphate molecules they become insoluble in the
water, no longer available as a nutrient. The aluminum ions also
attract dirt particles which, when drawn together, become heavy and
settle to the bottom resulting in sparkling clear water! The pH of the
water must be below 8.2 before treating with Phosclear! Application
rates vary from 17-70 lbs. per acre foot of water.
Alum is widely recognized as a great way to reduce phosphates and create crystal clear water. Alum is aluminum sulfate, when the aluminum ions bond with the phosphate molecules they become insoluble in the water, no longer available as a
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