Seachem Reef Fusion 2 - Alkalinity
Seachem Reef Fusion 2 - Alkalinity - 500ml is pre-ordered, confirm stock before ordering!
Pickup available at Jungle Aquatics
Usually ready in 2 hours
Seachem Reef Fusion 2 - Alkalinity - 500ml is pre-ordered, confirm stock before ordering!
Description
Description
Seachem Reef Fusion 2 - Alkalinity
Seachem Reef Fusion 2 - Alkalinity is a marine aquarium alkalinity supplement for reef keepers maintaining calcareous species, including corals. It supplies a concentrated mixture of carbonates and bicarbonates to restore and maintain alkalinity, providing the carbonate required for calcareous growth.
Reef Fusion 2 is designed as part of Seachem’s Reef Fusion system. Used alongside Reef Fusion 1, which provides calcium, it helps maintain the calcium and alkalinity levels required in a reef aquarium while providing biologically appropriate levels of other elements and trace minerals.
Key Benefits
- Restores and maintains alkalinity in marine reef aquariums.
- Contains carbonates and bicarbonates at an alkalinity of 4400 meq/L.
- Provides essential carbonate for calcareous species.
- Works with Seachem Reef Fusion 1 for a coordinated calcium and alkalinity dosing system.
How to Use
- Dose the aquarium every 1–2 days.
- Shake well before use.
- Add Reef Fusion 2 to a high-current area of the tank.
- When using with Reef Fusion 1, add Reef Fusion 1 first, wait a few minutes, then add Reef Fusion 2 in the same manner.
- Preferably add the two products in separate locations in the aquarium.
- Never mix Reef Fusion 1 and Reef Fusion 2 directly.
Dosage
- Add 1 mL of Reef Fusion 2 per 25 L (6.5 US gallons) of aquarium water.
- For reference, the cap holds 5 mL.
- The combined Reef Fusion 1 and Reef Fusion 2 dose contributes 4 mg/L of calcium and 0.176 meq/L of alkalinity.
- Dosage size or frequency may be increased if needed to maintain target levels, but do not exceed 4 mL/25 L (6.5 US gallons) per day.
Suitable For
- Marine reef aquariums.
- Reef systems housing calcareous species.
Compatibility
- Designed for use with Seachem Reef Fusion 1 calcium supplement.
Frequently Asked Questions
What does Seachem Reef Fusion 2 add to a reef tank?
It adds alkalinity through a mixture of carbonates and bicarbonates, with an alkalinity concentration of 4400 meq/L.
Should I use Reef Fusion 2 with Reef Fusion 1?
Yes. Reef Fusion 1 provides calcium and Reef Fusion 2 provides alkalinity; together they form the foundation of the Reef Fusion system.
How much Reef Fusion 2 should I dose?
Dose 1 mL per 25 L (6.5 US gallons) every 1–2 days. Do not exceed 4 mL/25 L (6.5 US gallons) per day.
Can Reef Fusion 1 and Reef Fusion 2 be mixed before adding them?
No. Never mix the two products directly. Add Reef Fusion 1 first, wait a few minutes, and then add Reef Fusion 2, preferably in a separate tank location.
What calcium and alkalinity levels should be maintained?
Maintain calcium between 380–420 mg/L and alkalinity between 3–6 meq/L.
Shipping
Shipping
When can I expect delivery?
- Gauteng (Jhb/Pta) - 1-3 working days
- Nationwide (Cpt/Dbn+) - 2-5 working days
- Outlying Areas - 3-7 working days
All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.
If you prefer a faster 🚀 shipping option, we also offer The Courier Guy during checkout in the dropdown selection. Please note that this option is not free, and you must choose it to use it. Please pay careful attention to the cutoff times and delivery timeframe for these options during checkout.
Bob Box & PUDO Lockers
Bob Box & PUDO Lockers
Enjoy the convenience of collection points and lockers! 📦
No more waiting at home or at work for your delivery. Simply choose a collection locker or pickup point and collect your order when it suits you.
Delivery times to lockers and pickup locations typically range from 2–7 working days, depending on your location.*
Search a PUDO Location Near You
Collection timeframes:
- Bob Box: Collect within 2 days of receiving your collection notification.
- PUDO Lockers: Collect within 36 hours of receiving your collection PIN or SMS notification.
If a PUDO parcel is not collected within 36 hours, it will automatically be transferred to the nearest PUDO Kiosk or Depot at no additional cost. The parcel will then be held there for approximately 2 days before being returned.
Please ensure you collect your parcel within the applicable collection period. Uncollected parcels will be returned to the sender, and additional shipping charges may apply should the order need to be resent.

