Bliss of Earth Multi Functional Chlorine (TCCA 90) Tablets are designed to boost chlorine levels and kill and prevent bacteria and algae for a clean, clear & Healthy pool. It is effective for all swimming pool types including pools with liners, gunite pools and saltwater pool systems. The addition of Bliss of Earth Chlorine Tablet to your Pool or spa in correct doses will ensure a perfectly clean and hygienic swimming water having no chlorine smell or irritation.