Pro-Kleen's Hot Tub & Whirlpool Complete System Flush is a professional, powerful formula designed to clean all of the plumbing and pipework in your hot tubs, whirlpool and spas. Whirlpool systems are prone to develop a build-up of grime, oil, biofilm and general dirt and this can then lead to them working inefficiently. Biofilm is particularly hard to remove as it forms a protective layer over bacteria, grime and microorganisms found within your whirlpool system and many cleaning products are unable to breakthrough. As a result, the bacteria are able to grow freely, causing unpleasant smells and the whirlpool system to stop working as efficiently. Our hot tub and whirlpool cleaner is sure to remove the biofilm, leaving your whirlpool as clean and hygienic as possible! Pro-Kleen's hot tub cleaner is sure to remove grease, body oils, general grime and biofilm that can form deep within your pipework. If left untreated, this kind of growth and build-up can lead to your whirlpool system working less efficiently, and over time, it could even stop working completely. For a thorough and deep clean, Pro-Kleen's formula also contains a powerful bactericide agent that will clean and sterilise your system. This will make sure no nasty bacteria will still be lurking in your system - ensuring it's sparkling clean! ProKleen Hot Tub & Whirlpool Complete System Flush Cleaner 2 x 5L in Clear