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FREE with Orders of $250 or More Benereef is not just a coral food, it is engineered for the entire reef. Our patent-pending pre and probiotic formula is unlike anything else on the market. It looks different and smells different because it is different...

FREE ON ORDERS OF $250 or MORE - JUST ADD TO CART! Hailed by critics as “the world’s best reefkeeping magazine,” CORAL is written by leading aquarium experts and marine biologists, lavishly illustrated with breathtaking images, and...

Trusted by Professionals, Perfected for Your Reef Aquarium! Synthetic Blend for Superior Reef Health Clean and Dissolves Quickly Proven and Trusted Choice for Over 50 Years Makes approx. 160 Gallons of solution at 1.024 specific gravity Discover...

Boost Filtration & Save Space with Adaptive Reef Perfect for Both Small and Large Aquarium Systems Holds Two Different Media Types Separately in a Single Reactor Choose Between 4" and 5" Models Adjustable Design with Precision Control for...

Boost Filtration & Save Space with Adaptive Reef Perfect for Both Small and Large Aquarium Systems Holds Two Different Media Types Separately in a Single Reactor Choose Between 4" and 5" Models Adjustable Design with Precision Control for...

Elevate Your Aquarium's Tech Setup! Halo-Lit & Face-Lit 3D Logo for a High-Tech Look Full RGB Lighting Customization to Match Your Setup Ample Space for Equipment with Easy Access Designed for Effortless Wire Management Quick-Release Latches...

Elevate Your Aquarium's Tech Setup! Halo-Lit & Face-Lit 3D Logo for a High-Tech Look Full RGB Lighting Customization to Match Your Setup Ample Space for Equipment with Easy Access Designed for Effortless Wire Management Quick-Release Latches...

Organize Your Aquarium Tech in Style! Removable Magnetic Clear Door for Easy Access Interchangeable Faceplates to Customize Your Setup Built-In Wire Management System for a Clean Look Controllable RGB LEDs to Add Vibrant, Customizable...

Organize Your Aquarium Tech in Style! Removable Magnetic Clear Door for Easy Access Interchangeable Faceplates to Customize Your Setup Built-In Wire Management System for a Clean Look Controllable RGB LEDs to Add Vibrant, Customizable...

The Ultimate Bubble Algae Destroyer Meet the Pitho Crab, the unsung hero of the reef aquarium clean-up crew. Often mistaken for its cousin, the Emerald Crab, the Pitho Crab is a specialized herbivore with an incredible appetite for one of the most...

The Ultimate Algae Predator For the aquarist facing a serious nuisance algae problem, the Black Long Spine Sea Urchin is one of nature's most effective and relentless solutions. With its dramatic, jet-black spines that can grow to incredible lengths,...

The Painted Starfish Hunter Arguably one of the most beautiful and ornate invertebrates in the ocean, the Harlequin Shrimp is a true living jewel. With a creamy white body adorned in a breathtaking mosaic of purple, pink, or blue spots, and unique,...

Pom pom crabs are about 0.5-1 inch wide on average. The Tiny Boxer of the Reef Prepare to be charmed by one of the most unique and fascinating creatures in the marine aquarium hobby: the Pom Pom Crab. This minuscule crustacean, also known as the Boxer...

A Stunning Centerpiece for Fish-Only Tanks Instantly recognizable and undeniably beautiful, the Chocolate Chip Starfish is one of the most iconic stars in the marine world. Its plump, beige body is adorned with dark brown to black tubercles that look...

The electric blue hermit crab (Calcinus elegans) is a rare, tropical crab with striking blue and orange colors:      Appearance The electric blue hermit crab has bright blue legs with black...

FREE ON ORDERS OF $100 OR MORE! Provide FREE cutting-edge reef-keeping information to hobbyists to encourage responsible reef-keeping and sustainability of our hobby.  Reef Hobbyist Magazine is a reef-focused magazine that teaches hobbyists of all...

The nutrient ratios for corals and sponges in reef tanks are ideal when nitrates and phosphates are present in the lowest concentrations. Tropic Marin® NP-Bacto-Balance uses a mix of select organic carbon compounds and suitable inorganic...

Product Description: Tropic Marin® Classic sea salt is an ideal foundation for the care and growth of all marine organisms in an aquarium. The salt is made up of all of the macro elements and trace elements in a natural balance, contained...

NOTE: The specific gravity is temperature dependent. With increasing temperature the specific gravity decreases. Therefore, the measured water temperature should be 25 °C / 77 °F to obtain a correct result.For an exact, reliable measure of...

The Ultimate Sand Sifting Powerhouse (2"+ Average Size) Meet the workhorse of the clean-up crew with the heart of a showpiece invertebrate: the Strawberry Conch. This essential sand-sifter is renowned for its tireless dedication to keeping your sandbed...

Average size of 2" - 5"+  Horseshoe crabs are unique-looking arthropods with a hard exoskeleton, a long tail, and a horseshoe-shaped body:      Appearance Horseshoe crabs have a dark brown or olive...

The Dancing Jewel of Nano Reefs (VERY SMALL) Add a splash of personality and vibrant motion to your aquarium with the one-and-only Sexy Shrimp. Famous for its unique behavior, this tiny shrimp holds its abdomen high in the air and sways rhythmically...

The coral banded shrimp (Stenopus hispidus) is a saltwater shrimp with a striking red and white color pattern, long antennae, and a prickly body texture:      Size: Can grow up to 2.4 inches...

Appearance Arrow crabs have a medium golden brown body with stripes of brown, black, yellow, or gold. They have 10 legs, eight for walking and two pincers, and their legs can be more than three times the length of their body. Their...

OPEN BOX RETURN Having adequate filters for a small size aquarium is crucial to keep the livestock healthy. With the new SHARK PRO NANO we are offering the best compact option with EXTRA flow and MAX filtration capacity for small aquariums. Two models...

Revolutionize Your Flow with the Next-Gen Jump Gyre Advanced Crossflow Technology: Eliminates dead spots for consistent water movement. Customizable Water Flow: Multiple modes and adjustable flow direction. Innovative Control...

Revolutionize Your Flow with the Next-Gen Jump Gyre Advanced Crossflow Technology: Eliminates dead spots for consistent water movement. Customizable Water Flow: Multiple modes and adjustable flow direction. Innovative Control...

Smart Doser 2 World’s First & Only Hang-On DoserIntelligent Dosing Made Simple and Reliable   Ultra compact design with intuitive aquaLine App for controlling your Smart Doser from anywhere in the world!Intuitive and intelligent...

Smart Doser 4 Impossibly Slim 4-Channel DoserIntelligent Dosing Made Simple & Reliable   Ultra compact design with intuitive aquaLine App for controlling your Smart Doser from anywhere in the world!Intuitive and intelligent programming allows...

Tropic Marin® Cyo-Control naturally blocks the recurrence of cyanobacteria in the aquarium. After the cyanobacteria have been removed manually, the probiotic bacteria of Tropic Marin® Cyo-Control settle in their place. Once these...

Diaphragm Water Pump The HYDROS Diaphragm Pump is a small 12V Drive Port accessory that uses positive external displacement to move liquids. It is a smart alternative to standard internal auto-top-off (ATO) pumps. Fitted with a GX-2 connector to be...

A Convenient Way to Maintain and Stabilize Calcium and pH Levels Fauna Marin Kalkwasser is an easy-to-use solution for maintaining calcium and alkalinity levels in a reef aquarium. It removes the need to use multiple supplements, helping to keep water...

A Convenient Way to Maintain and Stabilize Calcium and pH Levels Fauna Marin Kalkwasser is an easy-to-use solution for maintaining calcium and alkalinity levels in a reef aquarium. It removes the need to use multiple supplements, helping to keep water...

A Convenient Way to Maintain and Stabilize Calcium and pH Levels Fauna Marin Kalkwasser is an easy-to-use solution for maintaining calcium and alkalinity levels in a reef aquarium. It removes the need to use multiple supplements, helping to keep water...

Average frag 1-5 polyps.  If you are looking to buy vibrant color coral online to add to your reef tank, this is the best choice. TSA Frozen Apple Zoanthids are a fast growing coral that will reproduce and expand there colonies, for...

Average frag 1-5 polyps.  If you are looking to buy vibrant color coral online to add to your reef tank, this is the best choice. TSA Purple Monster Zoanthids are a fast growing coral that will reproduce and expand there colonies, for...

Average frag 1-5 polyps.  If you are looking to buy vibrant color coral online to add to your reef tank, this is the best choice. ACI Bob Marley Zoanthids are a fast growing coral that will reproduce and expand there colonies, for...

Average frag 1-5 polyps.  If you are looking to buy vibrant color coral online to add to your reef tank, this is the best choice. TSA Hydra Lady Dragon Zoanthids are a fast growing coral that will reproduce and expand there colonies, for...

Average frag 1-5 polyps.  If you are looking to buy vibrant color coral online to add to your reef tank, this is the best choice. TSA Circus Freak Zoanthids are a fast growing coral that will reproduce and expand there colonies, for...

Average frag 1-5 polyps.  If you are looking to buy vibrant color coral online to add to your reef tank, this is the best choice. TSA Scrambled Eggs Zoanthids are a fast growing coral that will reproduce and expand there colonies, for...