Relax Small 20g Chlorine tablets - 1kg Imperial These are high quality shock

These are high quality shock chlorine granules offering 70% free chlorine suitable for both residential and commercial pools

and stepped hose connector

After removing leaves etc you would replace these with the  pleated version for regular use

No phosphates equals no algae

PTL18P4 Pleatco Spa Filter Cartridge

Relax Small 20g Chlorine tablets - 1kg Imperial These are high quality shockChlorine is the most popular treatment for keeping swimming pool water chemistry balanced because it's highly effective and relatively low cost. Other disinfectants include bromine, ozone, and ultraviolet (UV) radiation. Chlorine can be added to pool water in several ways, including liquids, tablets and granules. Liquids can simply be poured into the water. Tablets can be added to a chlorine dispenser, in the pools swimmer basket or to an automatic