Baracuda Spa Pipe Cleaner 500ml is used to remove organic contaminants from spa pipes and spa baths before emptying and cleaning. Always follow the instructions on the package. This powerful cleaner is designed to remove oil, grease and contaminants from your water system to prevent the build-up of the bacteria that cause odours. Active constituent 80g/L Benzalkonium Chloride helps dissolve scale and grime, including calcium deposits in pipes.