One fluid ounce of Calcium Booster will raise the calcium hardness 7 ppm in 500 gallons of water.
Test the water with Leisure Time Spa & Hot Tub Test Strips to determine the amount of calcium booster needed.
Turn the jets on to circulate the water.
Pour the required amount of Calcium Booster into the water.
Run the filter for 1 to 2 hours.
Retest the water to ensure the proper level of 150-400 ppm has been reached.
Repeat steps 1-5 until the correct reading is obtained.