Pro-Kleen's Instant filter cleaner is designed to break down grime, dirt, grease, oil and more from the filter system of your pool, hot tub, spa or whirlpool. If left untreated, filters can be a breeding ground for bacteria and germs and this can cause hygiene levels in your pool to drop and eventually, can even cause damage to the internal works of the pool. Our filter cleaner is a super easy to use formula. It starts to get to work straight away to remove dirt and grime, making sure that once the filter is put back into your pool, it'll work better than ever! This will improve hygiene levels, help to remove any nasty odours and make your water clearer! For your peace of mind, this product is suitable for use on all hot tub, pool and whirlpool filters.