1. Tom Barr

    Ammonium Sulfate Should Be Included

    There's no (NH4)2SO4 in the calculator.
  2. T

    Calcium Carbonate vs Calcium Sulfate

    I recently switched to using an RO system due to severe inconsistencies in my tap water quality. I've been using GLA Ultimate GH booster. My assumption was the calcium would also raise kh, however it's calcium sulfate. Is there a significant difference between calcium sulfate and calcium...