Raise and maintain carbonate alkalinity (KH) without impacting pH. Seachem Reef Builder supplies bioactive calcium, magnesium, and some trace elements for corals. Seachem Reef Builder contains time-release ingredients, including chelating agents, to make essential elements biologically available.
To control pH and alkalinity, use, Seachem Reef Buffer, but to promote active growth of corals, use Reef Builder alone, or with Marine Buffer. 300 grams treats 4,800 gallons of saltwater.
Why it's Different
Shop all Marine Aquarium Buffers .
Please click on "More Information" for directions for use.