|Tom Barr's general water hardness booster contains: 3 parts Potassium Sulfate, 3 parts Calcium Sulfate, 1 part Magnesium Sulfate by weight. 1 lb. One Tablespoon or 16 grams will raise the GH of 20 gallons of water by 3 degrees or 1 meg/liter.|
|Calcium Chloride |
1 lb. CaCl2
Calcium is important for cell wall strength and thickness of stems. Chloride is used for photosynthesis.
|Calcium Nitrate |
1 lb. CaNO3
Provides calcium and nitrates in a water soluble form. Potassium nitrate alternative for international customers. 19.0% - 15.5%
|Calcium Sulfate |
1 lb CaSO4
AKA Gypsum supplies calcium to plants without increasing alkalinity.
|Dolomitic Calcium carbonate 1 lb|
A magnesium source that lowers acidity / increases alkalinity.