Features: 1. Pool effervescent tablet is very practical. It helps prevent algae and increase water clarity. 2. Pool effervescent tablet is effectively. It can reduce the amount of algaecide and flocculant you use. 3. These pool water disinfectants can create a safer, cleaner and more enjoyable swimming experience. 4. Put the tablets and water into the floating dispenser. If you have an underground water tank, put the tablets in the basket, as the tablets will melt faster in the water. 5. Fast, simple and accurate measurement method, very suitable for water analysis in swimming pools and hot tubs. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Size: As the picture shown Package List: 50g/100g x Effervescent Chlorine Tablets or 50g/100g x Effervescent Chlorine Tablets with Dosing Device or 1 Set x 50g/100g Pool Cleaner