Estelle is a unique patented filter cleaning system, designed to clean whirlpool and hot tub filters to perfection in just a flash. It works solely on the basis of water power and doesn't use chemicals which makes it very environmentally-friendly. Estelle also consumes about 80% less water than other cleaning methods which doesn't just save you a lot of water and the cost of new filters, but also helps avoid getting your hands dirty!You insert the filter to be cleaned into the appliance, connect it to a tap and turn the tap on. The filter will be perfectly clean within just one minute making it spotless again for more hygienic bathing fun!Cleans excellent, Safe, quick and simple, Extremely durable, Suitable for almost every filter. Works just with water pressure; electricity or chemicals are not necessary. Save money!