| Desired value (ppm) | ||
| Current value | ||
| Volume of Water | ||
| CaCl2 | g | oz | |
| CaCl2.2H20 | g | oz | tsp |
Note: Teaspoon = 5ml - Thanks to Habib Sekha of Salifert for the teaspoon convertion for CaCl2.2H20 (4.7g / 5ml).
Personally I always use a balanced method of calcium and alkalinity supplementation (see other pages in this section). However occasionally you may need to add "Turbo Calcium" as it is commonly called if your calcium levels drift below the balance point (use the Ca/alk balance calculator to find your desired Ca concentration).
You should check on the packet to see whether the calcium chloride you are using is anhydrous (in other words pure calcium chloride, or is the dihydride version (i.e. bound with 2 molecules of water). Apparently the Kent product is the anhydrous version.
Note that these chemicals tend to absorb water over time so this is only a starting point, you may need a little more than the weights calculated. However, start with these values and then TEST!
In terms of actually adding the chemical, first dissolve in RO or DI water then out of preference, drip the solution in slowly. Personally I wouldn't try to increase the calcium levels more than 20 ppm per day.