Seachem Reef Builder for Coral Growth
Seachem 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.
| Specifications |
|---|
| Package Size: 500 g |
| Volume Treated: 32,000 L (8,000 gallons) |
Directions
Beginner: Use half a level teaspoon per 80 liters (21 gallons) of water.
FAQ
Can Reef Builder be used with other alkalinity supplements?
Yes, Reef Builder can be used together with Reef Buffer.
Does Reef Builder affect the pH of the water?
No, Reef Builder raises carbonate alkalinity without immediately affecting pH. Long-term use may lead to stabilization at pH 8.3.
Will using Reef Builder deplete calcium or strontium levels?
No, when used as directed, Reef Builder will not deplete calcium, magnesium, or strontium.



Sebastian Terry –
I’ve been using Reef Builder for several months now and my corals are growing steadily. The alkalinity has increased without any pH spikes, which is exactly what I needed. It’s easy to dose and works well with my existing tank setup.
Ryan Walker –
Good product for maintaining alkalinity. I noticed a slight increase in pH over time, but it stayed within safe ranges. Works well with Reef Buffer when I need to adjust pH as well.
Molly Ball –
My reef tank has been stable since I started using Reef Builder. No issues with calcium depletion, and my polyps are more active than before. Very reliable for long-term use.