SpaPure Liquid Hardness Increaser | Spa Calcium
SpaPure Liquid Hardness Increaser is a pre-dissolved liquid calcium formula that safely raises the calcium hardness of your spa water. Because it's already in liquid form, it mixes in instantly — no granules to dissolve, no powder settling on the bottom of the shell.
Calcium hardness is one of the most overlooked parts of water balance, but it matters as much as pH. Water that's too soft — low in calcium — is corrosive: it pulls minerals from wherever it can find them, attacking your heater, pump seals, jets, and the spa shell, and it's a leading cause of stubborn foaming. (Water that's too hard causes the opposite problem — scale — so the goal is the right balance, not maximum calcium.)
If your fill water is soft, or it runs through a water softener, your spa almost certainly needs this. Bringing calcium hardness into range protects your equipment, extends the life of the spa, reduces foaming, and gives the water a more pleasant feel — and the liquid format makes it about as easy to add as it gets.
SpaPure®
SpaPure® Brand FAQs
What is SpaPure, and who makes it?
SpaPure is a line of spa and hot tub water care products from Haviland Pool & Spa, a 100% employee-owned American manufacturer with more than 55 years of pool and spa experience. Haviland's Pool & Spa division began in 1968 in Grand Rapids, Michigan, and all SpaPure products are made in the USA.
Is SpaPure formulated specifically for spas, or is it pool chemicals in smaller bottles?
SpaPure is engineered specifically for spas and hot tubs. Spa water is a different challenge from pool water — far less volume, a much higher bather load per gallon, and hotter temperatures that accelerate everything. SpaPure's formulas are concentrated and dosed for that environment rather than scaled-down pool products.
Can I use SpaPure products with my chlorine, bromine, or salt water system?
Yes. SpaPure makes products for chlorine, bromine, and salt/mineral programs, plus balancers, shocks, clarifiers, and specialty treatments that work alongside any of them. Match the sanitizer-specific products to your system, and use the balancers and oxidizers regardless of which sanitizer you run. If you're not sure what fits your setup, a quick water test will point you to the right products.
Why buy SpaPure from an authorized dealer like Leisure Time Inc.?
Buying from an authorized dealer means you get fresh, correctly stored product — spa chemicals degrade with age and poor storage — backed by people who can actually help you use it. Leisure Time Inc. has carried spa water care for decades, and our team can match products to your specific spa and water chemistry. Chemicals sold far below market price on third-party marketplaces are often expired, mishandled, or gray-market, with no support behind them.
Why do some SpaPure products ship ground only and can't be returned by mail?
Certain spa chemicals — chlorine and bromine products, oxidizers, and some acids — are classified as hazardous materials by the U.S. Department of Transportation. Federal regulations require them to ship by ground rather than air and prohibit consumers from mailing them back. Products with this restriction are noted on the product page. If you have unopened chemicals you no longer need, you can return them in person at one of our showrooms or contact us about your options.
How do I know which SpaPure products my spa needs?
Start with a water test. Testing tells you what your water actually needs instead of guessing — which sanitizer level to adjust, whether to balance pH or alkalinity, and when to shock. You can test at home with SpaPure test strips, or bring a water sample to any Leisure Time showroom for free in-store testing and a product recommendation. You can also call us and we'll walk you through it.
About SpaPure®
SpaPure is a spa-specific water care brand made by Haviland Pool & Spa, a 100% employee-owned American company with more than 55 years in pool and spa chemistry. Haviland's Pool & Spa division began in 1968 in Grand Rapids, Michigan, as one of the early pioneers of modern pool and spa treatments, and today produces over 100 products across eight in-house brands. Because Haviland is employee-owned through an ESOP, the people who make and stand behind SpaPure have a direct stake in whether your water turns out right.
SpaPure is built specifically for spas and hot tubs — concentrated, fast-acting formulas designed for the small water volumes and high bather loads that make spa water harder to keep balanced than pool water. The line covers the full routine: sanitizing, shock and oxidation, water balance, clarifiers and enzymes, stain and scale control, and salt-system support — all proudly made in the USA.
