Seachem Reef Builder – 500g


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Reef Builder raises carbonate alkalinity without immediately impacting on pH. With long term use there will be a tendency to stabilize at pH 8.3. Carbonates and calcium are essential to all coral growth. If either becomes deficient coral growth will cease followed by a rapid decline in coral health. Used as directed Reef Builder will not deplete calcium magnesium or strontium which usually tend to precipitate with increasing alkalinity. Reef Builder and Reef Buffer may be used together. Use Reef Builder to raise carbonate alkalinity without affecting pH. Use Reef Buffer to raise carbonate alkalinity and pH. 500 g treats 32000 L 8000 gallons.


BEGINNER Use half a level teaspoon per 150 L 40 gallons twice a week. Dissolve in at least one cup of freshwater. Check alkalinity every 2 weeks and adjust dose or frequency accordingly.

ADVANCED Check alkalinity then follow dosing regimen above until alkalinity is adjusted to 45 meqL. Each dose will raise alkalinity by about 0.25 meqL. Size or frequency of dose can be adjusted but do not exceed 1 meqL 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 topoff water t0.05va tteaspoons to add to top off water vvolume of tank in gallons aamount to raise alkalinity in meqL. For example if you want to raise your alkalinity by 1 meqL in a 50 gallon tank then you would add 0.05x50x12.5 teaspoons into the topoff water.

HINTS Use MultiTest Marine pH and Alkalinity to measure total alkalinity.

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  • Reef Builder 500 Gram