Product Fact Sheet: SpaGuard Lo’N’Slo

Product Features:

  • Granular sodium hydrogen sulfate (sodium bisulfate).
  • Slowly lowers pH.
  • Helps prevent scale build-up, cloudy water and eye irritation.
  • Safer than liquid acid (hydrochloric acid, muriatic acid).


  • Protects spa and equipment.

Application Instructions:

  1. If pH rises above 7.6, add Lo’N’Slo with circulation running and aeration off.
  2. Determine amount by performing an acid demand test in a BioGuard test kit or see the approximate dosage chart below.
  3. If controlling the pH is a continual problem, test for total alkalinity and adjust as necessary or use Perfect Balance.
pH 7.6 – 7.8 7.8 – 8.0 8.0 – 8.4 Above 8.4
Lo’N’Slo per 1,000 litres 0.5 tsp. 0.75 tsp. 1.5 tsp. 2 tsp.

Available Sizes:

  • 750-gram bottles

NOTE: Avoid physical contact with product. Follow safety information on label Instructions. Store in a cool, dry place. Keep out of the reach of children.