Seachem Reef Builder is a high-purity supplement designed to safely and effectively raise carbonate alkalinity in saltwater reef aquariums. Its primary function is to increase and maintain dKH levels without causing an immediate or drastic shift in pH. With consistent use, this formula helps to create a stable environment by gradually buffering the water to a target pH of 8.3, which is ideal for coral health and growth.

Unlike many other alkalinity supplements, Reef Builder is formulated to prevent the precipitation of essential elements like calcium, magnesium, and strontium when dosed correctly. This unique characteristic ensures that your major and minor elements remain bioavailable for your corals. For ultimate control over water chemistry, Reef Builder can be used in tandem with Seachem's Reef Buffer, allowing you to adjust alkalinity and pH independently or together as your system requires.

This product is perfect for the discerning reef aquarist who needs to correct low alkalinity while their pH level is already stable and within the desired range. It provides a targeted solution for maintaining one of the foundational pillars of reef chemistry without unwanted side effects. Whether you are managing a high-demand SPS coral system or a mixed reef, Reef Builder offers a reliable and precise method for ensuring your alkalinity remains consistently between the recommended 8-14 dKH.