Seachem Laboratories Reef Builder Biological Enhancer, 10.6 oz

Behind every flourishing reef is a careful balance of calcium and carbonates, and Reef Builder helps you tend the carbonate side of that equation. Seachem Laboratories Reef Builder raises carbonate alkalinity without immediately impacting pH, and Seachem notes that with long-term use it tends to stabilize at pH 8.3. This is the 10.6 oz size, a practical container for reef keepers managing alkalinity in their systems. Support the steady chemistry your corals quietly depend on.

• Raises carbonate alkalinity without immediately impacting pH, for measured, controlled adjustments.
• Seachem says long-term use tends to stabilize the tank at pH 8.3.
• Carbonates and calcium are essential to all coral growth, and Reef Builder supplies the carbonate side.
• Helps guard against the deficiency that, per Seachem, can stop coral growth and lead to declining coral health.
• Used as directed, Seachem says it will not deplete calcium, magnesium, or strontium that usually tend to precipitate with increasing alkalinity.
• Can be used together with Reef Buffer as part of a coordinated dosing approach.
• Use Reef Builder to raise carbonate alkalinity without affecting pH, a distinct role from pH-raising buffers.
• Pairs with a calcium source like Reef Advantage Calcium or Reef Complete to cover both essentials.
• The 10.6 oz size suits reef keepers maintaining alkalinity in a home system.
• Made by Seachem Laboratories, a trusted name in aquarium water care.

Keeping carbonate alkalinity stable is one of those quiet tasks that pays off in healthy, growing corals, and Reef Builder is designed to make it straightforward. Because it raises carbonate alkalinity without immediately impacting pH, you can adjust with care rather than guesswork, and Seachem says regular use tends to settle the tank around pH 8.3. Use it as directed alongside a calcium supplement so both essentials stay in supply, and remember that Reef Builder and Reef Buffer can be used together when your routine calls for it. This 10.6 oz size gives caring reef keepers a dependable carbonate source for everyday maintenance. Give your reef the balanced chemistry it needs, and let your corals keep growing strong.