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.
Barrs GH Booster
$8.00
Availability: 21 in stock
| Weight | 1 lbs |
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