Sodium bisulfate question

Bam Bam

Gold Supporter
Sep 14, 2019
Columbia, SC
I’ve read many posts that say do not use sodium bisulfate in swcg pools. I can’t find a similar warning for non swcg pools. Any reasons why muriatic acid is preferable from a pool integrity point of view?



Gold Supporter
TFP Guide
Jul 21, 2013
Northern NJ

Problems sulfates can cause include:
  • Sulfates can damage concrete & plaster
  • Excess sulfates in water increases the likelihood of corrosion on metal parts
  • Excess sulfates in splash out water leads to degradation of any concrete surfaces
  • Sulfates degrade the coatings on SWG plates
  • At high enough concentrations, sulfates can react with calcium to form spindly, needle-like crystals of calcium sulfate (gypsum)
  • While sulfates in vinyl pools is typically not as problematic as in plaster pools, scaling of gypsum crystals can increase the risk of liner puncture.