Its a wonderful way to maintain healthy water if you have a busy schedule or are spending a weekend away. The swimming pool tablets benefit an above ground pool in many ways. As well as containing chlorine, which kills bacteria and other ghastly organisms by disinfecting water, the tablets also contain an algaecide solution. Many pool owners only use algaecide when algae has invaded their pool but water treatment tablets are a fantastic way to kill algae before it has become visible to the naked eye. Includes 50 x 20g tablets.Suitable for pools less than 15ft & hot tubs. Adjust PH levels to the ideal range of 7.2-7.6 to promote bather comfort, plant protection and effective chemical usage. The tablets are designed for usage with floating dispensers or suitable chlorine feeders. Tablets erode slowly over a period of 3-5 days (depending on the water flowing over them). Ideal chlorine levels are between: Pools 1-3mg/I (ppm); Spas 3-5mg/I (ppm) as tested by test kit or strips. Please note: May cause respiratory irritation, eye irritation, harmful if swallowed. The item "Chlorine Tablets for Hot Tub Swimming Pool Lay Z Spa Jacuzzi 1kg tubs, 50 x 20g" is in sale since Monday, June 17, 2019. This item is in the category "Garden & Patio\Swimming Pools & Hot Tubs\Pool Chemicals & Testing\Pool Chemicals & Clarifiers". The seller is "infinitedeals776" and is located in Kilwinning. This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Czech republic, Denmark, Estonia, Finland, France, Germany, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Netherlands, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Liechtenstein.