Can this be used in a freshwater tank to raise the kh?

Yes but dosing is different. Follow the instructions on the bottle.

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Seachem Reef Builder 300gram

Product ID: 10348447

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🌊Minimal pH impact

🧪No depletion of key minerals

⚗️Raises KH

Description

🌟 Build Your Reef, Build Your Legacy!

EASY APPLICATION - Simple to use for both novice and expert aquarists.
ELEVATE YOUR REEF - Boosts carbonate alkalinity effortlessly!
BALANCED CHEMISTRY - Maintains stable pH for thriving marine life.
ECO FRIENDLY FORMULA - Sustainable blend of carbonate sources for a healthier reef.
MINERAL PRESERVATION - Safeguards calcium, magnesium, and strontium levels.

Seachem Reef Builder is a premium 300-gram formula designed to raise carbonate alkalinity (KH) in your aquarium while ensuring minimal impact on pH levels. This innovative blend preserves essential minerals like calcium, magnesium, and strontium, making it an ideal choice for both novice and experienced aquarists looking to create a thriving marine ecosystem.

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TrustScore 4.5 | 7,300+ reviews