Seachem Reef Fusion 2 Alkalinity (KH) Supplement for Reef Aquariums
Seachem Reef Fusion 2 1L
$14.99
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Standard U.S. shipping: $12.99; free standard shipping on eligible qualifying orders of $100 or more. Specialty shipments are charged separately.
Shipping & Delivery
Standard/Economy: $12.99; free standard shipping on eligible qualifying orders of $100 or more.
Most in-stock orders process in 1–3 business days. Estimated standard transit is 5–12 business days after dispatch. Backorders, preorders, and special orders follow their stated lead times. Dates are estimates, and separate shipments may have separate charges.
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Reef Fusion 2
Maintain stable alkalinity and support overall reef stability with Seachem Reef Fusion 2. This is a concentrated alkalinity supplement designed for reef aquariums.
Reef Fusion 2 provides carbonate alkalinity (KH), which plays a critical role in maintaining stable pH and supporting coral structure. When used alongside Reef Fusion 1, it helps create a balanced system for consistent reef parameters and long-term coral health.
How It Works
Alkalinity (KH) is essential for:
- Stabilizing pH
- Supporting coral skeletal growth
- Maintaining overall reef balance
Reef Fusion 2 works by:
- Raising carbonate alkalinity
- Supporting stable pH levels
- Complementing calcium dosing
Result: A more stable and balanced reef environment
IMPORTANT: Proper Use
Reef Fusion 2 is part of a two part dosing system and should not be used incorrectly.
Best Practice
- Use with Reef Fusion 1 for balanced dosing
- Dose separately (never mix before adding)
- Test alkalinity (KH) regularly
What to avoid
- Do NOT mix with Reef Fusion 1 before dosing
- Do NOT dose without testing
- Do NOT make large corrections at once
Improper use can:
- Spike alkalinity
- Stress corals
- Cause instability in your tank
What It Helps With
- Low alkalinity (KH) levels
- pH stability
- Supporting coral growth
- Maintaining reef parameter balance
Why It Matters
Alkalinity is one of the most important parameters in a reef tank.
Without stable KH levels, pH can fluctuate and coral health can decline.
Perfect For
- Reef aquariums (LPS, SPS, mixed reefs)
- Hobbyists managing alkalinity
- Balanced dosing systems
How to Use
Add as directed to raise and maintain alkalinity levels.
Test before and after dosing
Adjust gradually for stability
Pro Tip
For best results, pair with:
- Reef Fusion 1
- KH (alkalinity) test kit
- Calcium testing
- Save when purchasing together with the Fusion 1 & Fusion 2 Bundle
Balanced dosing = long term reef success
Why Buy From Infinity & Beyond Aquatics?
Get personal aquarium support, help checking compatibility and clear shipping information before ordering. Contact us with questions about choosing or maintaining this item for your aquarium.