Bestway Flowclear Swimming Pool Water Heater, Grey by Amazon.co.uk

• Take the chill off your pool to create a relaxing swimming environment by gently heating the water

• Easy to set up and use thanks to it's soft-touch digital control panel

• Heater connects to the pool filter via 32 mm hose connection

• Compatible with filter pump/Sand filter flow rate: 3,785 L/hour (1,000 gal/hour) and below