Aquasparkle Spa Sparkle is used to add lustre and clarity to Hot Tub and Spa water. Ideal for use with cartridge filter pumps as on most above ground pools and spas. Cloudy water is caused by non filterable waste particles that are too small for the filter to remove. Spa Sparkle combines together fine particles of dust in your water making the particles bigger and easier for the filter to trap, resulting in clear water. Aquasparkle Spa Sparkle Features & Benefits - 1 Litre of High Quality Spa Sparkle Clarifier from AquaSparkle - For adding lustre and clarity to spa water. - Hgihly effective water polisher. - Add directly to your hot tub water. - For a 1,000 litre tub, add 50ml initial dose and you can top up weekly with 25ml per week. Aquasparkle Spa Sparkle Application Instructions 1. Apply this product directly to your spa water whilst the spa pump(s) are turned on to aid distribution. 2. Spas treated for murky water may require cartridges to be cleaned a week after treatment. 3.