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ProTeam Spa Calcium Hardness Increaser for Hot Tub, 1 lb
✅ In stock
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Grade
Analysis Confidence
20%
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Price verified Sep 28, 2026 12:45 PM · Prices & availability subject to change
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📝 Product Overview
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📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
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Product Details
✓Corrosion Prevention: Low calcium hardness makes hot tub water aggressive, corroding pumps, heaters, and metal fittings over time. ProTeam Spa Calcium Hardness Increaser hot tub owners trust is a calcium chloride flake formula that raises hardness back to the ideal range so your equipment stays protected.
✓Scale Prevention: When calcium runs low, water pulls minerals from surfaces instead, leaving behind stubborn scale that clogs filters and strains heaters. This calcium booster for hot tub water buffers against that imbalance and helps stop scale from building up.
✓Water Stability: Balanced calcium hardness keeps pH and total alkalinity from swinging, so your other hot tub chemicals work the way they are supposed to. Stable water is easier on your equipment and your regular maintenance routine.
✓Bather Comfort: Water that is too soft or too hard can leave skin feeling irritated and cuts down on how well soaps and lotions work in the tub. Getting hardness into range keeps the water comfortable for everyone who uses it.
✓Easy To Use: These fast-dissolving white flakes work directly in circulating water — no premixing needed. Add 1 oz (2 Tbsp) per 500 gallons to raise hardness ~10 ppm. For a big increase, work in increments of no more than 5 oz at once, since larger amounts won't fully dissolve. Works with all sanitizer systems: bromine, chlorine, mineral, and biguanide.
✓Care Guide: Each bottle includes access to a free downloadable SplashWiz Hot Tub Chemicals Care Guide to help with the rest of your water balance.
⚙️ Specifications
Brand
SplashWiz
Item Weight
16 ounces
Item Form
White Flakes
Product Benefits
A Fast-Dissolving Calcium Increaser For Hot Tub Water, Mix Right Into Circulating Water., A Little Goes A Long Way, About 2 Tablespoons Per 500 Gallons, A Skin-Friendly Hot Tub Hardness Increaser For Every Soak, The Spa Hardness Increaser For Hot Tub Raises Calcium Hardness To The Ideal 150 To 250 PPM Range., This Hot Tub Calcium Hardness Increaser Protects Pumps, Heaters, And Pipes
Number of Packs
1
Brand Name
SplashWiz
Package Size Name
(1 lb)
Number of Items
1
Unit Count
16 Ounce
Item Highlight
Prevents Scale & Corrosion, Fast-Dissolving Flakes, Economical, Includes Splashwiz Hot Tub Chemicals Care Guide
Item Type Name
calcium hardness increaser
