MAV AquaDoc 12 Piece-Count Spa

Calcium levels low? The ideal hardness level is 200 - 400ppm (parts per million). Proper calcium levels in your hot tub make managing pool chemistry significantly easier and cost effective. It makes your water balance more predictable and therefore easier to manage - resulting in less chemical waste. Increase spa water hardness with our spa calcium increaser for hot tubs. Avoid corrosion from soft water with our premium calcium hardness increaser. Low calcium levels can cause corrosive water which can ruin your spa or hot tub. to prevent etching and staining at your tub's surface level that can be caused from low calcium levels. Balance your water easily and effectively using our spa hardness increaser. Directions for spa calcium balancing: first, check your hot tub's hardness levels to determine if calcium levels are too low (they should be between 200 - 400ppm). Adding 1 ounce of AquaDoc's calcium increaser will increase 500 gallons of water's hardness level by 10ppm. After determining hardness level goal, pour product into spa. Please note, the equipment must be on while adding calcium increaser. Run filter for 1 - 2 hours, wait 20 minutes, then re-test water. It's always better to underdone at first and measure before adding more.