Seachem Reef Builder 300g

Product details

Seachem Reef Builder 300g (366) is a reef aquarium water additive designed to raise carbonate alkalinity (KH). It’s commonly used to support stable alkalinity in marine systems without causing an immediate large pH shift, helping you fine-tune carbonate levels for reef keeping. Reef Builder is part of Seachem’s alkalinity approach and can be used alongside Reef Buffer depending on whether you want to adjust alkalinity with or without pH support.

Features:

• Raises carbonate alkalinity (KH) with minimal impact on pH
• Uses a blend of carbonate sources intended not to lower pH like competing bicarbonate-only products
• Formulated to avoid depleting calcium, magnesium, or strontium when used as directed
• Designed for long-term use where pH may tend to stabilize around 8.3
• Can be paired with Reef Buffer for alkalinity management (alkalinity-only vs alkalinity-with-pH approach)

Specifications:

• Product name: Seachem Reef Builder 300g (366)
• What it does: Raises carbonate alkalinity (KH)
• pH impact: Minimal immediate impact on pH; long-term use tends to stabilize at about pH 8.3
• Target alkalinity (recommended range): 3–5 meq/L (8–14 dKH)
• Minimum alkalinity to avoid dropping below: 2 meq/L
• Compatibility concept: Reef Builder and Reef Buffer may be used together; Reef Builder to raise KH without affecting pH, Reef Buffer to raise KH and pH