SpaPure Alkalinity Increaser | Spa pH Buffer

• 1 x SpaPure Alkalinity Increaser (resealable container, granular — available in 1 lb or 2 lb, depending on the size you select)

• Raises total alkalinity — brings low alkalinity back into the proper range
• Stabilizes pH — acts as a buffer to prevent pH bounce
• Protects your spa — proper alkalinity guards against corrosion and scale
• Helps your sanitizer work — balanced water lets chlorine or bromine perform efficiently
• Pure sodium bicarbonate — straightforward, dependable chemistry
• No wait to soak — the spa may be used immediately after application
• Two sizes — 1 lb for occasional adjustments, 2 lb for frequent fills or better value

When you add sodium bicarbonate to spa water, it raises the total alkalinity — the water's capacity to neutralize acids. That buffering capacity is what keeps pH from swinging every time you add a chemical or a few bathers get in. Higher, balanced alkalinity means your pH stays put, which in turn keeps your sanitizer effective and your water comfortable.

The dosing is predictable: roughly 1/2 ounce (1 tablespoon) per 200 gallons raises total alkalinity about 10 ppm. That makes it easy to calculate exactly how much you need to reach your target instead of guessing.

Pro Tip: Alkalinity doesn't drift the way pH does, so you only need to test it about half as often as pH. Once you've set total alkalinity into range, it tends to stay there between water changes — check it during your fill and then just periodically, and spend your routine attention on pH and sanitizer instead.

Use whenever total alkalinity tests below the proper range. Aim for a total alkalinity of 80–120 ppm.

1. Turn on the circulation system.
2. Add 1/2 ounce (1 tablespoon) per 200 gallons of water to raise total alkalinity about 10 ppm, broadcasting the product over the surface of the water.
3. The spa may be used immediately after application.
4. Wait about one hour, then retest total alkalinity and repeat as needed until it sits in the 80–120 ppm range.

Pro Tip: Add it in steps, not all at once. Calculate the dose for your spa's gallons, add it, let it circulate, and retest before adding more. Working up to your target gradually keeps you from overshooting — and overshooting alkalinity means reaching for a pH/alkalinity decreaser to walk it back.

• Brand: SpaPure
• Product Type: Total alkalinity increaser / pH buffer (balancer)
• Form: Granular
• Active Ingredient: Sodium bicarbonate (100%)
• Dosage: 1/2 oz (1 tbsp) per 200 gallons raises total alkalinity ~10 ppm
• Available Sizes: 1 lb and 2 lb
• Coverage: 1 lb provides roughly 30+ alkalinity adjustments for a typical spa; the 2 lb provides about double (actual amount depends on how far off your alkalinity is)
• Target Level: 80–120 ppm total alkalinity
• Ready to Use: Immediately after application
• System: Compatible with all sanitizer systems (chlorine, bromine, salt, mineral)

SpaPure Alkalinity Increaser works in any spa, on any sanitizer system — chlorine, bromine, salt, or mineral. As a balancer, it's part of the foundation you set before your sanitizer goes to work, so it fits every water care routine.

It pairs naturally with the rest of your balancing lineup: a pH decreaser for when pH climbs too high, SpaPure test strips to read your alkalinity and pH, and your sanitizer and shock — which should always be added after the water is balanced. Think of this as step one, before chlorinating granules, brominating tabs, or oxidizing shock.