Water Care & Medications
Reef Builder – Seachem
$19.99
- Ships any business day
- Products we use on our own reefs
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Product details
Product details
Reef Builder – Seachem is a water chemistry additive designed to raise carbonate alkalinity in aquarium systems. Practically, it’s used to help maintain stable buffering capacity so that alkalinity stays in the proper range for many reef and other carbonate-demanding setups, supporting conditions that depend on carbonate alkalinity without immediately pushing pH upward.
Features:
- Raises carbonate alkalinity without immediately impacting pH
- With long-term use, it will tend to stabilize pH at about 8.3
- Helps prevent unintended depletion of calcium, magnesium, or strontium that can occur when alkalinity rises
- Designed to be used as directed to support consistent alkalinity levels in saltwater aquariums
- Can be used together with Reef Buffer™ to adjust both alkalinity and pH depending on your target needs
- Supports maintenance goals where alkalinity should be kept within a specific meq/L (dKH) range
Specifications:
- Product type: Carbonate alkalinity supplement (reef water additive)
- Alkalinity target: 3–5 meq/L (8–14 dKH)
- Minimum alkalinity: Not below 2 meq/L
- pH effect (immediate): Will not immediately impact pH when used as directed
- pH tendency (long term): Tends to stabilize at pH 8.3 with long term use
- Interaction with calcium, magnesium, strontium: Will not deplete calcium, magnesium, or strontium (when used as directed)
- Compatible product: Reef Buffer™ may be used together (use Reef Builder™ to raise alkalinity without affecting pH; use Reef Buffer™ to raise alkalinity and pH)





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