Stop fighting to keep your hot tub chemistry balanced. Wave Alkalinity Increaser is a fast-dissolving granular solution that locks your water into the perfect chemical sweet spot. Key Features: • Prevents pH Bounce: Stops rapid, frustrating pH shifts • Fast-Dissolving Formula: Quick, easy dosing • Builds a Strong Foundation: Essential first step for balanced water • Reliable Results: Crystal-clear, comfortable spa water

Always follow the dosage guidance on the packaging and test your water regularly with a suitable test kit. Add chemicals with the filtration running. Store in a cool, dry place, tightly closed and out of reach of children. Wash hands after use. See product label for full safety information.

Something not quite right? You have 21 days from the day you receive it, to send something back. When you purchase Debenhams Deliver+, you will have an extra 14 days on top of our standard 21-day window to initate a return.

Please note, we cannot offer refunds on fashion face masks, cosmetics, pierced jewellery, adult toys, and swimwear or lingerie if the hygiene seal is not in place or has been broken.

Items of footwear and/or clothing must be unworn and unwashed with the original labels attached. Also, footwear must be tried on indoors. Items of homeware including bedlinen, mattresses, and toppers, and pillows must be unused and in their original unopened packaging. This does not affect your statutory rights.

Click here to view our full Returns Policy.