Clean all of the plumbing and pipework in your hot tubs, whirlpool and spas with Pro-Kleen Hot Tub and Whirlpool Complete System Flush. The 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 break through. For a thorough and deep clean - it also contains a powerful bactericide agent that will clean and sterilise your system.