Zodiac Calcium Up - Increases Calcium Hardness Size:500g This filter fits these Pre

This filter fits these Pre August 2010 O2 Spas and swim spas:

1 of 1 - attaches to garden hose for pre filtering of spa water

5 inch jet body to suit various Arcadia / Monarch spas

Manufacturer: Signature

Zodiac Calcium Up - Increases Calcium Hardness Size:500g This filter fits these PreZodiac Calcium Up Active constituent: Calcium Chloride Increases calcium hardness in spa water Essential for water balance Helps protect spa equipment Application: Dosage Rates 25 grams will raise the Calcium Hardness by 10ppm per 2,500 Litres. Product should be pre dissolved in a bucket of water. Add one third of the required amount at a time for best results. Dosage rates indicated are a guide only. Please refer to the label for further