Red Sea Reef Base consists of naturally occurring reef sand spheres mixed with aragonite coral chip. The spheres are highly porous calcareous shells of simple protozoa (foraminifers) and bring many benefits to all marine aquariums.

Red Sea Reef Base is an ideal substrate for all marine fish & invertebrate aquariums. Testing has shown that using these substrates will maintain a stable pH and a high buffer capacity over extended periods of time. Furthermore the porosity of the spheres provides an excellent media for both aerobic (nitrifying) and anaerobic (denitrifying) biological filtration.

Reef Base substrate contains natural aragonite (the most dissolvable from of calcium carbonate) that maintains natural levels of pH with its high buffering capacity.

Furthermore the porosity of the spheres provides an excellent media for both aerobic (nitrifying) and anaerobic (denitrifying) biological filtration.

Each bag of pre-washed, impurity-free Reef Base will provide the right quantity of substrate for a 2”(5cm) layer in a 10-gallon(40 liter)aquarium.

This is an ideal substrate for all fish and invertebrate tanks.

This quality substrate comes from a CITES approved location on the exotic shores of Southeast Asia. The procurement and preparation does not involve the destruction of beaches, reef ecosystems, or cause any other damage to the environment.

High-Purity, Aragonite-based Refugium Substrate

For placement in refugia, sea grass and mangrove systems, and reef aquaria

A blend of high-purity aragonite particulate grades to simulate the natural substrate particle profile of tropical reef lagoons

Multiply inside length and width of container intended to hold the substrate (in inches), then multiply by the required depth (recommended max depth of 2 inches), then multiply by 0.05 to get approximate weight of KoraLagoon Substrat needed (in pounds)

CaribSea’s Mineral Mud™ is a unique blend of sediments that duplicate tropical fringing coastal mangrove environments.

Mineral Mud™ particles are in a size range compatible with soft, burrowing infaunal, macro animal assemblages.

Ideal for mud refugiums, seagrasses, macro-algaes, and mangroves, Mineral Mud™ provides a variety of trace elements, chelated trace elements, plus calcium, strontium, iron, sulfur and free carbon.

In addition, Mineral Mud™ contains live marine bacteria, to
complete the tropical ecosystem.


Product #: 00526 (1 gallon).

Only CaribSea’s Aragalive contains not just the broad spectrum of natural marine bacteria found in the ocean, but additional specially selected strains of marine bacteria as well.

Aragalive helps control dangerous ammonia levels and reduces nitrate and nitrite.

Aragalive creates a natural biological balance, and makes cycling a new aquarium faster and safer.

Available in 6 different environments for use in all marine and reef tanks including Plenums, nitrate reduction beds, sumps, fish tanks, and more!

Caribsea #00793

Live Aragonite Sand

Ultra-Fine Grade

Caribsea #00792

Live Aragonite Sand

X-Fine Grade

It’s the only crushed coral with aragonite, which provides up to 25 times the buffering power of other crushed corals, dolomite or oyster shell.

Eliminates chronic pH problems and provides maximum surface area for water purifying bacteria.

CaribSea’s Florida Crushed Coral with aragonite allows an increase in bioload by up to 50% and it never needs replacement! Approx 2-5mm diameter (1/8 - 1/4”).


This product is also able to be utilized in calcium reactors and plenum systems to deliver not only calcium, but also carbonate buffer, and essential trace elements such as strontium (up to 10,000 ppm!).

CaribSea
#00110 (10 lb)
#00150 (40 lb)