Red Sea – Reef Foundation C (Magnesium)
Magnesium Supplement for Balanced Reef Chemistry
Reef Foundation C is Red Sea’s magnesium solution, formulated to maintain proper ionic balance and support healthy coral growth. As part of the Reef Foundation program, it provides magnesium in the precise ratio found in natural seawater, helping to stabilize calcium and alkalinity levels in reef aquariums.
Made with ultra-pure ingredients, this supplement is ready to dose with no mixing required.
Available Sizes:
- 500 mL
- 1000 mL
- 5000 mL
Key Details:
- Main Component: Magnesium salts
- Function: Supports skeletal development and ionic balance
- Form: Pre-mixed, high-purity solution
- Use: Dose directly into system – no preparation needed
Dosing Guide:
- 1 mL per 25 gallons raises magnesium by 1 ppm
- Adjust dosing based on regular magnesium test results
Full Reef Foundation System:
- Foundation A: Calcium & Strontium
- Foundation B: Alkalinity
- Foundation C: Magnesium
Designed to be used together for complete reef mineral support and enhanced coral health.
We totally understand that plans change! You can modify or cancel your order as long as it hasn’t been shipped yet. Just call or email us right away - our team will confirm if we can catch it before it leaves our facility.
If your order is already in transit, you’ll need to request a return once it arrives. Keep in mind that some items, like aquariums and livestock, can’t be returned.
For full terms, please refer to our Refund & Return Policy.
Placing an order is simple - just add your item to the cart & complete the checkout process online. Once your order is confirmed, we'll reach out to you directly to schedule a local pick-up appointment at our facility.
* All local pick-ups are by appointment only *
Order processing typically takes 1-2 business days for products that are in stock or readily available through our network of distributors. Some products, however, are fulfilled on demand directly from our distributors, which can slightly extend processing and delivery times depending on availability and location.
Rest assured - we always work to get your order shipped as quickly as possible.
If you’d like to confirm availability or request an ETA before placing your order, you’re always welcome to call or email us.