A pool bubbler is a tank inside the reactor containment containing cold water or ice to condense the steam-water mixture. This mixture is generated inside the reactor containment when the emergency protection system is triggered. Pool bubblers are very popular and in high demand by pool owners.

Before the Pool bubbler became known for its functionality, separate attention was paid to its appearance. Pool bubblers are known for looking whimsical and visually appealing and can give a pool a unique and distinctive look.