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!