Seachem Reef Builder™

Seachem Reef Builder raises carbonate alkalinity (KH) in a reef aquarium, the reserve corals draw on to build skeleton, without swinging pH.

Key features

• Raises carbonate alkalinity for coral growth
• Holds pH steady rather than spiking it
• Dry supplement, dosed to an alkalinity test

Use Reef Builder to hold alkalinity, and pair it with a calcium supplement so the two move together; if only calcium is low, dose that instead. Part of our water care. Available for local pickup at our Lethbridge store.