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Aquarium Additives & Supplements

Find aquarium supplements, including the best reef supplements like: calcium, alkalinity, magnesium, bacteria supplements, coral additives, and aquarium vitamins.

Marine Depot carries the best aquarium additives and reef supplements, products that benefit fish, plants, and corals.

The best supplements for reef tanks are the major elements calcium, alkalinity, and magnesium, often combined as a 2-part system, which provide the building blocks for coral and coralline algae. These reef tank supplements replenish what corals consume as they grow.

Reef supplements also include amino acids, minor, and trace elements that help corals flourish. Coral foods also promote coral growth and vibrant colors. Bacteria aquarium additives are an excellent way to reduce waste, clarify water, and provide nutrition for coral. Some aquarium additives remove unwanted elements. Water conditioners dechlorinate and detoxify impurities. Pest and algae control additives remove nuisance organisms.

Contact our award-winning support for help in choosing fish tank additives.
425 Results
E.S.V. B-Ionic Calcium Buffer System Part 2 - 1 Gallon Calcium Refill

E.S.V. B-Ionic Calcium Buffer System Part 2 - 1 Gallon Calcium Refill

E.S.V. B-Ionic 2-Part Calcium Buffer 64oz (32oz each bottle)

E.S.V. B-Ionic 2-Part Calcium Buffer 64oz (32oz each bottle)

Life Rock Frag Zone (2.25 lbs) - CaribSea

Life Rock Frag Zone (2.25 lbs) - CaribSea

CaribSea Life Rock Nano Arches (4 Pieces)

CaribSea Life Rock Nano Arches (4 Pieces)

E.S.V. B-Ionic 2-Part Calcium Buffer 32oz (16oz each bottle)

E.S.V. B-Ionic 2-Part Calcium Buffer 32oz (16oz each bottle)

Kent Marine Tech CB Part A 128 oz.

Kent Marine Tech CB Part A 128 oz.

Kent Marine Tech CB Part B 128 oz.

Kent Marine Tech CB Part B 128 oz.

Kent Marine Tech CB Part B 64 oz.

Kent Marine Tech CB Part B 64 oz.

Kent Marine Nano Reef Parts A & B - 8oz each

Kent Marine Nano Reef Parts A & B - 8oz each

Kent Marine Tech CB Part A 64 oz.

Kent Marine Tech CB Part A 64 oz.

Brightwell Aquatics Coral Growth Kit

Brightwell Aquatics Coral Growth Kit

Blue Life USA Safety Stop Instant Fish Quarantine

Blue Life USA Safety Stop Instant Fish Quarantine

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