Zodiac Calcium Up 4kg - Pool Hardness Increaser Spa Chemical

Protect your pool surfaces from corrosion with the Zodiac Calcium Up! Whenever your calcium hardness levels drop below 200, use some Zodiac Calcium up to bring up those levels up to 200-500ppm so that your water won't "eat" the calcium from your pool's surfaces. Benefits: Increases the level of calcium in swimming pools and spas Will attempt to dissolve anything it comes into contact with until it reaches it's desired hardness level Prevents damage caused by improper water balance Assists in maintaining the Calcium Hardness level within the correct ranges of 200- 500ppm Essential for water balance Helps protect pool surfaces and equipment