Part of the popular Pro-Kleen Spa Range, this professional, powerful formula thoroughly cleans to remove bacteria, dirt, slime and unpleasant smells from your hot tub, pool or spa. With its unique antibacterial properties, it effectively kills bacteria and helps to prevent regrowth. Bacteria, body oils, skin cells, organic dirt & grime enter your hot tub water via many various sources. This, along with general grime, creates a breeding ground for undesirable & potentially harmful bacteria and in turn promotes an unhealthy bathing environment. Pro-Kleen's Hot Tub, Pool & Spa Filter Cleaner is highly effective in removing oils, grease and minerals - all of which hinder filter performance. Bacteria, body oils, skin cells, organic dirt & grime enter your hot tub water via many various sources. This, along with general grime, creates a breeding ground for undesirable & potentially harmful bacteria and in turn promotes an unhealthy bathing environment. Pro-Kleen's Hot Tub, Pool & Spa Filter Cleaner is highly effective in removing oils, grease and minerals - all of which hinder filter performance. Each 5L bottle will provide 10 treatments. Only 500ml is required per use!