1. Check to see if chlorine cartridge is empty.
If the system is floating with the bottom orange side facing up – the chlorine cartridge needs to be replaced. If you shake it and do not hear chlorine tablets rattling inside, it is empty.
2. Check the dial setting. Unless you are at the highest setting and still not getting enough chlorine then consider raising your setting. Maintain a 0.5 to 1.0 ppm chlorine level.
3. Evaluate the pool usage. If the pool is being used a lot, then the need for chlorine (chlorine demand) is increased. If this is a temporary situation such as a pool party, then you should shock the water with either a chlorine or non-chlorine shock. If it is an ongoing situation, then consider a higher dial setting and potentially a longer pump run time per day.
4. Clean your filter, skimmer or pump basket. If any of these are clogged with debris it is restricting water flow which means the chlorine is not dispensing into the pool.