Seachem Seachem Reef Builder
Seachem [11442-503304]

Seachem Reef Builder

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Seachem Reef Builder raises carbonate alkalinity without immediately impacting water pH. With long term use there will be a tendency to stabilize at pH 8.3. Reef Builder supplies carbonates and calcium, which are essential to all coral growth.

  • Raises carbonate alkalinity
  • Does not immediately impact pH
  • Promotes healthy coral growth


If either calcium or carbonates become deficient, coral growth will cease, followed by a rapid decline in coral health. Used as directed, Seachem Reef Builder will not deplete calcium, magnesium, or strontium which usually tend to precipitate with increasing alkalinity.

Seachem Reef Builder and Reef Buffer may be used together. Use Sea Chem Reef Builder to raise carbonate alkalinity without affecting pH. Use Reef Buffer to raise carbonate alkalinity and pH.

Directions: 500 g treats 32,000 L (8,000 gallons). Use 3 grams per 40 gallons twice a week and check alkalinity every 2 weeks and adjust amount or frequency accordingly.

Price:$10.80 to $112.00

Questions? Call us Mon-Thurs: 8am-5pm, Fri: 8am-2pm Pacific Time: 1-888-373-8686

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$10.80
$19.99
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600 Grams (1.3 lbs)
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Status:In Stock
Model:363
UPC:000116036306
Sku: SC03630
Id: 512196

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$19.65
$35.99
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1.2 kg (2.6 lbs)
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Status:This item is temporarily out of stock.
Model:367
UPC:000116036702
Sku: SC03670
Id: 503306

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$112.00
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$224.99
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7.2 kg - (6 x 1.2 kg)
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6KG REEF BUILDER 2.2LB /6
Status:This item is temporarily out of stock.
Model:03670M
UPC:680031021184
Sku: SC03670M
Id: 626159

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