White Poly Aluminium Chloride powder.
Clears up hazy or cloudy water by allowing fine particles to stick together. Once the particles get big enough they will sink and can get vacuumed out.
Dosage: 35g per 1000 litres of water dissolved in a bucket of warm water. Tip the required amount into the pool with the filter pump running but the filter in recirculate mode. Leave filter running in recirculate mode for 24 hours while floc forms and settles to bottom of pool. Vacuum settled floc to waste. Return filter to normal filter position.
This product is acidic so it’s best to wear gloves when using. Clean up any spilt product by flushing with plenty of water.
Safety data sheet can be found here:
(Bag design may differ from image shown depending on current supplier.)