SpaGuard Stain & Scale Control | Metal & Scale

Available in two sizes — choose your size at checkout:

• 1 x SpaGuard Stain & Scale Control — 1 Pint (16 oz liquid)
• 1 x SpaGuard Stain & Scale Control — 1 Quart (32 oz liquid)

Note: Both sizes are the identical formula — only the bottle quantity differs. The dose is 1 oz per 300 gallons, so even the pint treats many fills. Keep the bottle tightly sealed and store in a cool, dry place away from other chemicals.

• Prevents and removes metal stains — controls iron, manganese, and copper so they can't discolor the shell.
• Prevents calcium scale — stops scale from high calcium levels building up on spa surfaces.
• Protects your spa shell — keeps surfaces clean, smooth, and looking new.
• Ideal at fresh fill — locks up metals and excess minerals from the start, especially with well or hard water.
• Simple weekly maintenance — easy 1 oz per 300 gallon dose keeps protection topped up.
• Works with every common sanitizing system — chlorine, bromine, ozone, and biguanide.

Stains and scale both start with dissolved minerals in the water. Metals like iron, manganese, and copper can drop out of solution and bond to the spa surface as discoloration; calcium, when it's too concentrated, crystallizes into hard scale on shells and equipment. Once either one deposits on the surface, it's difficult to remove without aggressive scrubbing or specialty treatments.

SpaGuard Stain & Scale Control works as a sequestering agent — it chemically grabs hold of those dissolved metals and excess minerals and keeps them bound up in the water, where they stay suspended and harmless instead of depositing on surfaces. Because the metals and calcium are held in solution, they can't stain or form scale, and the filter and normal water changes carry them away over time. Used regularly, it keeps that protection continuous.

Pro Tip: Stain & Scale Control manages the metals and excess minerals; your calcium balance manages the rest. If your water is too soft (low calcium), that's a different problem — corrosion and foam — handled by SpaGuard Calcium Hardness Increaser. Stain & Scale Control is your tool for staining and high-calcium scale.

Start-Up

1. Dip a chlorine test strip in the spa water.
2. Compare the results using the chart on the back of the bottle.
3. Add 1 oz of Stain & Scale Control per 300 gallons of water.
4. Circulate the spa or hot tub water for 1 hour.

Weekly Maintenance

1. Using spa test strips, test your spa's water and adjust when needed.
2. Add 1 oz of Stain & Scale Control per 300 gallons of water.
3. Ideal total alkalinity range: 80–120 ppm.
4. Ideal pH range: 7.2–7.8.

Pro Tip: Keep your water balanced while you protect it. Stain & Scale Control works best with alkalinity at 80–120 ppm and pH in range — out-of-balance water makes both staining and scaling more likely, so the balancer and the protectant work hand in hand.

• Product: SpaGuard Stain & Scale Control — Metal & Scale Protectant
• Brand: SpaGuard (BioGuard family)
• Available Sizes: 1 Pint (16 oz) and 1 Quart (32 oz)
• SKUs: Per-variant — confirm from backend
• Form: Liquid
• Function: Prevents and removes metal stains; prevents calcium scale
• Controls: Iron, manganese, copper, and calcium scale
• Active Type: Sequestering agent / chelant (confirm from label)
• Start-Up Dose: 1 oz per 300 gallons; circulate 1 hour
• Maintenance Dose: 1 oz per 300 gallons weekly
• Ideal Total Alkalinity: 80–120 ppm
• Ideal pH: 7.2–7.8
• Best Practice: Add at fresh fill, especially with well or hard water
• Sanitizer Compatibility: Chlorine, bromine, ozone, and biguanide
• Surface Compatibility: Safe for all common spa surfaces
• Country of Origin: Made in USA
• Shipping: Ships UPS Ground only
• Hazmat Classification: Non-hazardous — not DOT-regulated; ships standard and is mail-returnable

Stain & Scale Control is a maintenance product that fits any spa care routine:

• Chlorine spas — fully compatible.
• Bromine spas — fully compatible.
• Ozone systems — compatible.
• Biguanide systems — compatible.
• All spa surfaces — safe for use with all common spa surfaces.

Important: Stain & Scale Control protects surfaces from metals and scale; it is not a sanitizer or a water balancer. Use it alongside your regular sanitizer, shock, and balancers.