offer a convenient, pre-measured method for keeping hot tub water clean without handling messy chemicals. Spa Pods contain a powerful formula that oxidizes contaminants, eliminates odors, and restores sparkling clear water! After using your spa, simply toss one pod into the tub with the circulation jets and pump working. The pod will dissolve and effervesce for a few minutes. Leave uncovered for one hour and running for at least 2 hours. One pod treats 500 gallons. 10 pods per package.