Chemicals

Keeping your hot tub clean, balanced, and ready to enjoy starts with the right chemicals. From chlorine granules and tablets to pH adjusters, alkalinity boosters, spa shock, and complete starter kits, our hot tub chemicals collection has everything you need to maintain crystal-clear water all year round. Whether you're a first-time spa owner or a seasoned soaker, browse our full range of hot tub chemicals and keep your water safe, fresh, and perfectly balanced.

FAQs: Chemicals

How often do I need to add chemicals to my hot tub?

We recommend testing your hot tub water at least twice a week using test strips and adjusting chemical levels as needed. Always balance total alkalinity first, then pH, then sanitiser. How often you need to top up chemicals will depend on how frequently the spa is used and how many people are using it.

What pH level should my hot tub water be?

The ideal pH range for hot tub water is between 7.2 and 7.6. Below 7.2 the water becomes too acidic, which can cause eye and skin irritation and damage spa components. Above 7.6 the water becomes too alkaline, leading to cloudy water and reduced effectiveness of your sanitiser. Use pH Up or pH Down to adjust accordingly.

How often should I change my hot tub water?

Hot tub water should be completely drained and refilled every 3 to 4 months, depending on how frequently the spa is used. Over time water accumulates dissolved solids and contaminants that chemicals alone cannot remove. Each time you refill, use a spa flush product to clean the plumbing before draining for the best results.