We have found the following instructions have worked well, and often better than the ones listed on the bottle. There is no guarantee that Watertite will solve the problem, but with a small leak of around 1” per week, it’s the easiest and cheapest thing to try first. Sometimes the leak stays fixed for months, years or forever; there is just no way to predict. We’ll keep our fingers crossed and hope for the best.
1. Turn heater temperature to 65 degrees. Open spa cover two hours to reduce temperature a few degrees.
2. Remove filter(s).
3. Turn jet pump(s) on high speed.
4. Locate filter canister that is drawing water at fastest rate.
5. Shake the bottle of Watertite.
6. Slowly pour entire contents into that canister. It’s pretty thick, so take your time. (This may take up to 45 seconds.)
7. With spa cover closed, run jet pump(s) for about 2 hours.
8. Your spa normally filters the water twice a day. When you think about it, run the jet pump(s) an additional 2-3 times per day for 7 days. (If your upper control panel is programmable, set to 4 cycles per day, at 60 minutes each.)
Drain spa. Clean shell.
9. Let the spa sit empty and “cure” for up to 7 more days.
10. Re-fill spa, re-install filter(s), and raise heat back to desired temperature. Use as you normally would.