Red Sea Reef Foundation C – Magnesium (500 mL)

$21.49

Magnesium keeps calcium and alkalinity stable — Foundation C tops it up without junk ions. Test monthly and dose to ~1300–1400 ppm. Key details Magnesium supplement 500 mL bottle Foundation ABC program Stabilizes Ca/Alk balance Not sure if it suits your setup? Ask our Reef Bot for help choosing, and we can help expedite your…

2 in stock

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Aquarium systems ship by scheduled freight, not by parcel carrier. Checkout shows a single flat Scheduled Freight Delivery charge for continental U.S. addresses, and you see the exact amount in the cart before you pay. The $10 livestock Box & Handling Fee and the $349 livestock free-shipping threshold do not apply to an aquarium system. Ask us to confirm availability and the delivery arrangements for your address before you order.

Freight delivery is offered to the continental U.S. at checkout. We do not ship to Alaska or Hawaii. Installation and maintenance is a local service in Key West and the Florida Keys; everywhere else we ship the system and you arrange the install.

Description

Magnesium keeps calcium and alkalinity stable — Foundation C tops it up without junk ions.

Test monthly and dose to ~1300–1400 ppm.

Key details

Magnesium supplement
500 mL bottle
Foundation ABC program
Stabilizes Ca/Alk balance

Not sure if it suits your setup? Ask our Reef Bot for help choosing, and we can help expedite your order.

Shipping & Returns

Equipment and dry goods ship at their own rate. Free shipping at $349 or more applies to qualifying livestock only — corals, fish, inverts and live copepods. The $10 box & handling fee is a livestock packing fee and does not apply to dry-goods orders.
All sales are final on equipment and dry goods. We are a retail store, not the manufacturer.
Register your product with the manufacturer and keep your receipt — their warranty is how a faulty unit gets replaced, and they are faster at it than a shop could be.
Not sure who to contact for a warranty claim? Call us and we will point you to the right place.

Full Refunds & Returns policy

Ships from our Key West store · (305) 850-9949

Your Red Sea tank, with the details worked out.

Send us your preferred model, cabinet color, delivery ZIP and buying timeframe. We will review availability, equipment choices and delivery arrangements so you can evaluate a complete quote before committing.

Review my build and delivery

Catalog prices are planning estimates. Final availability, delivery eligibility, freight and applicable tax require confirmation. Installation and maintenance is a local service in Key West and the Florida Keys; systems ship nationwide and you arrange the install elsewhere.