Designed for residential spas and hot tubs running a chlorine sanitizer program. Not compatible with biguanide-based systems (Baqua Spa, SoftSoak) — chlorine cannot be combined with biguanide chemistry under any circumstances.
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Works alongside: ozone systems, mineral cartridges (silver/copper), and salt-generated chlorine systems where supplemental chlorine is needed
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Spa shells: acrylic, vinyl, fiberglass, rotomolded plastic, stainless steel
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Equipment: safe on heater elements, circulation pumps, jet bodies, and standard cartridge filters at recommended doses
Maintenance
Spa 56 is fast-acting and concentrated — a 1/2 oz. dose per 500 gallons will reach 2 to 3 ppm residual within minutes, and adding more just means waiting longer before you can get in (chlorine above 5 ppm is irritating to skin and eyes). Start with the label dose, retest after 5 minutes, and add more only if needed. Small doses, retest, repeat is always the right pattern.
- Test residual chlorine every 2–3 days, and always after heavy bather use.
- When residual drops below 2 ppm, add ½ oz. of Spa 56 per 500 gallons.
- Broadcast granules evenly across the water surface with jets running.
- Wait at least 5 minutes for full dissolution and mixing before retesting.
- Maintain residual at 2–3 ppm continuously between uses.
