SpaPure Liquid pH Minus | Spa Liquid pH Decreaser

• 1 x SpaPure Liquid pH Minus (1 pint / 16 fl oz, ready-to-use pour bottle)

• Instantly lowers pH — brings high, alkaline water back into the ideal range
• Ready to use — liquid pour formula, no mixing or dissolving
• Also lowers total alkalinity — adjusts both, ideal when both run high
• Prevents scale — protects plumbing and equipment from scale formation
• Improves clarity and comfort — clears cloudy water and eases bather comfort
• Universally compatible — works with all spa water treatment systems

Liquid pH Minus is an acidic solution that neutralizes the excess alkalinity driving pH up, lowering both the pH and the total alkalinity of the water. Aim for a pH of 7.2–7.6, the range where water is clear, non-scaling, comfortable, and where your sanitizer performs best.

It does the same job as granular pH Down, with one practical difference: because it's already in solution, it disperses the instant it hits the water with no waiting for granules to dissolve and no risk of dry acid resting on the shell. Pour it in with the pump running and it mixes immediately. Because pH naturally creeps upward in a working spa, this is a product you'll reach for regularly.

Pro Tip: Add it slowly near a return jet with the pump running, never into still water. A liquid acid disperses best into moving water, and adding it gradually lets you sneak up on your target pH instead of overshooting. Pour with care and avoid splashing — this is a concentrated acid, so handle it the way you would any pool or spa acid.

Never mix different products together in the same bottle or pail. Add this product directly to the spa water with the circulation system running. Use only when pH is above the ideal range, aiming for a pH of 7.2–7.6. Always follow the bottle label for exact dosing.

1. Turn on the circulation system.
2. Add approximately 16 oz (1 pint) per 100 gallons of water, pouring directly into the spa near a return jet. Adjust the amount based on how far above range your pH is.
3. The spa may be used after the product has dispersed and the water is balanced.
4. Wait, then retest pH and total alkalinity, and repeat as needed until pH sits between 7.2 and 7.6.

Pro Tip: Make pH adjustments before you shock, not after. Your sanitizer and shock work best in the 7.2–7.6 window, so correcting pH first means the chlorine or bromine you add next is far more effective — and you avoid wasting product fighting out-of-range water.

• Brand: SpaPure
• Manufacturer: Haviland Consumer Products
• Part Number: C002624-CS40P
• Product Type: pH decreaser — liquid (balancer)
• Form: Ready-to-use liquid (no mixing required)
• Net Size: 1 pint (16 fl oz)
• Function: Lowers pH and total alkalinity
• Dosage: Approx. 16 oz per 100 gallons (follow bottle label; adjust to current pH)
• Target Level: pH 7.2–7.6
• Application: Pour directly into spa water near a return jet with the pump running
• Retest: Retest pH and total alkalinity, then repeat if needed
• System: Compatible with all spa water treatment systems
• Application Note: Concentrated acid — add to moving water, avoid splashing; never mix with other products in the same container
• Shipping: Ground shipping only (ships via UPS Ground; classified as a regulated liquid acid)

SpaPure Liquid pH Minus is compatible with all spa water treatment systems — chlorine, bromine, salt, mineral, and biguanide. As a balancer, it's part of the foundation you maintain alongside your sanitizer, regardless of how you sanitize.

It's the liquid alternative to granular pH Down, and the counterpart to a pH increaser (for when pH drops too low). It works alongside an alkalinity increaser and SpaPure test strips. Balance pH and total alkalinity before adding sanitizing and shock products. Never mix it with other chemicals in the same bottle or pail — add it directly to the spa water.