Zodiac Spa Calcium Up 500g

1. This product is used for increasing calcium hardness. The ideal calcium level is 175-350ppm * (NOTE - Always check with your spa professional for the correct levels of calcium and refer to manufacturer's manual.

2. Always test the water before adding chemicals;

3. Dissolve the product in a bucket of spa water, and then apply the solution evenly around the edges of the spa, away from the skimmer, with filter running for 4-6 hours.

4. For optimal results, add 1/3 of the required amount at a time.