BEGINNER: Use 3 g (1/2 level teaspoon) per 150 L (40 gallons) twice a week. Dissolve in at least 250 mL (1 cup) of freshwater. Check alkalinity every 2 weeks and adjust amount or frequency accordingly. For precise dosing, use the Seachem Digital Spoon Scale™.
ADVANCED: Check alkalinity, then follow addition regimen above until alkalinity is adjusted to 4–5 meq/L. Each 3 g/150 L will raise alkalinity by about 0.25 meq/L. Quantity or frequency can be adjusted, but do not exceed 12 g/150 L per day. Thereafter, use as required to maintain alkalinity.
EXPERT: After determining the alkalinity consumption rate, set up a continuous drip system. Use the following formula to determine how much to add to your top–off water: m=0.08va (m=grams to add to top off water, v=volume of tank in liters, a=amount to raise alkalinity in meq/L). For example, if you want to raise your alkalinity by 1 meq/L in a 200 liter tank, then you would add 0.08x200x1=16 g into the top–off water. [For reference: 1 gallon=3.8 liters, 6 g=1 teaspoon]. Notes: Use MultiTest:® Marine pH & Alkalinity to measure total alkalinity.
DO NOT OVERDOSE: Excess alkalinity may enhance the loss of calcium, magnesium, and strontium. Do not directly mix with any calcium, magnesium, or strontium supplement. Best if calcium & carbonate additives are added on alternate days or at least 30 minutes apart.
Contains carbonate, bicarbonate, chloride, and sulfate salts of sodium, magnesium, calcium, strontium, and potassium. Each gram contains a minimum of 12 meq of alkalinity.
Reef Builder™ Dosing Tables
Standard Dose
Raises alkalinity by approximately 0.25 meq/L
| Water Volume | 1 qt / 1 L | 1 gal / 4 L | 10 gal / 40 L | 40 gal / 200 L |
| Reef Builder™ Dose (g) | 0.019 g | 0.075 g | 0.75 g | 3 g |
| Reef Builder™ Dose (tsp) | 1/320 tsp | 1/80 tsp | 1/8 tsp | 1/2 tsp |
Formula
Want a different result? Here's how to calculate it:
NOTE: MEQ/L IS NOT EQUAL TO dKH
If your test kit gives results in dKH, you will need to convert to meq/L before using this calculator.
50 ppm = 2.8 dKH = 1 meq/L
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Dose in grams =
Your tank volume (gal) x the amount you want to raise your alkalinity (meq/L) x 0.3
Do not increase your alkalinity by more than 1 meq/L in a single day
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Dose in teaspoons =
Your tank volume (gal) x the amount you want to raise your alkalinity (meq/L) x 0.05
Do not increase your alkalinity by more than meq/L in a single day
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