Frequently Asked Questions

• How often should I use Stain & Scale Control in my hot tub?
  For maintenance, add 1-2 oz per 500 gallons weekly. If you have hard water or notice recurring staining, use more frequently. Always add when refilling your spa with fresh water.
• Is this product compatible with Bullfrog, Jacuzzi, and Sundance Spas?
  Yes! Hot Tub Things® Stain & Scale Control works with all hot tub brands including Bullfrog, Jacuzzi, Sundance, Hot Spring, and Caldera. Safe for all spa surface materials.
• Will this remove rust stains from my spa shell?
  Yes! This formula removes iron (rust) stains, copper, calcium, and other mineral deposits. For heavy staining, use a higher initial dose and allow 24-48 hours before brushing.
• Can I use this with a saltwater hot tub system?
  Absolutely. Stain & Scale Control is compatible with salt systems, chlorine, bromine, and all sanitizer types without affecting their effectiveness.
• How is this different from regular spa clarifiers?
  Clarifiers filter particles, while Stain & Scale Control targets dissolved minerals that cause staining and scale. Use both for complete water care—one prevents minerals, the other improves filtration.
• What's the difference between this and other stain removers?
  Hot Tub Things® uses a professional-grade chelating formula that both prevents AND removes mineral deposits. Our concentrated 32 oz formula provides better value with multiple treatments per bottle.