Instructions and Guidelines
Basic: Dissolve 2.5 grams (~3/4 teaspoon) of product per 20 US-gallons of aquarium water in 16-fl. oz. of fresh water; add every other day or as needed to maintain the magnesium concentration within a range of 1,290 - 1,320 ppm. When used in this fashion, 1,200 g treats up to 9,600 US-gallons (36,340 L).
Advanced: First raise the magnesium level using the basic instructions above. Once desired level has been acquired, measure aquarium's magnesium concentration at the same time each day over a one- to two-week period to determine the daily rate of magnesium uptake (i.e. the decrease in magnesium daily). Determine the amount of Magnesion-P to add using this formula: Daily Amt (grams) = Daily Loss (in ppm) x Tank Volume (gallons) / 64. Alternately to measure in liters, use this formula: Determine the amount of Magnesion-P to add using this formula: Daily Amt (grams) = Daily Loss (in ppm) x Tank Volume (liters) / 243.
For example: If you determine that you need to raise the magnesium level in your 50 gallon aquarium by 10 mg/L or 10 ppm, you would add 10 x 50 / 64 or 7.8 grams or about 2.5 teaspoons of powder in as much water as it takes to fully dissolve (about 16 oz. per 2.5 grams or about 48 oz.) of water and mix until clear and cool. Then add that amount to your aquarium.
Caution: Keep out of reach of children. Not for human consumption. Wear rubber gloves and goggles when handling. Contents may get very hot when water is added!