MarcoRocks has taken the guesswork out of choosing how much of each rock type to use when planning that perfect aquarium scape. In our new "The Perfect Mix" box you'll find just the right mix of MR Coralline Foundation, MR Coralline Hybrid, and MR...

The NEW 2024 GEO Algae Reactor is designed to filter your aquarium water by removing phosphates, nitrates, Co2 and help raise your aquarium pH without the use of artificial media.  This amazing reactor incorporates two external 30 watt CRIMSON LED...

*******THESE REACTORS ARE IN STOCK AND WILL SHIP SAME DAY NEXT DAY - NO NEED TO WAIT FOR THEM TO BE BUILT******* The Super Silent Extreme CR818 SSE will hold 24 pounds of large grain media and is suitable for reef aquariums up to 300-600...

Who knew your favorite tank accessory would be on your sand bed?!   Introducing the PNW Custom Pocket Stand! This 15 hole frag stand is the perfect place to store your most prized frags - zoas, torches, and more! The small footprint is great for...

Great for quick runs to the store, tradeshows or to pick up frags from a friend.  Small (3.5" x 2.75") Cup Transport.  Center post with height adjustable 4 Frag Disk 

Max Flow: 1,600gph | 5~10watts | 20 - 80+ gallons Includes: Pulse 2 pump, power supply and new WiFi Controller with mounting cradle. Applicable for glass or acrylic aquariums up to 1/2 in. Generates Massive Water...

On average 3/4" - 1" in size.  If you are looking to start buying coral online, to add to your aquarium, this is a great Large Polyp Stoney coral. Ultra red Goniopora coral has bright red flower shaped tentacles with pink tips. A great LPS coral...

The Blade Glow will fluoresce your tank and help your corals “pop”. Coral Glow features a LED mix that maximizes spectral peaks that showcase coral fluorescence. Ideal as a supplemental source of fluorescence that can be added to a Blade Grow...

The premium REEFER MAX series features the entire REEFER G2+ range in a Plug & Play configuration that can save up to $ 1,299! With the release of the REEFER DC Skimmer, ReefRun DC Pump and ReefATO+, Red Sea has finally completed the...

CORALMAX is a custom unique blend formulated from naturally occurring marine planktons and marine organisms. Corals require multiple types of nutrition to succeed and thrive in captivity. CORALMAX is ideal for all photo and non-photosynthetic fliter...

Because SICCE’s NEW PSK SDC 1200 matches the same design and size of the popular traditional SICCE PSK 1200, this Skimmer Pump represents a simple and immediate upgrade to all protein skimmers currently equipped with the SICCE PSK 1200. ...

Copper treatment for external parasites Active at low concentration (does not precipitate) Bound on amine so it is not as toxic to fish 100% Removable with carbon or Cuprisorb Cupramine™ effectively eradicates Oodinium, Cryptocaryon,...

Shimz allows you to add shimmer to your Neptune SKY LED. As equipped, and with surface water agitation, the SKY provides a gentle shimmer that suits the tastes of most aquarists. We realized early in the SKY development that when you put a diffuser in...

10 Pack is great for portioning food for your tank sitter!  Defrost and rinse your frozen food at the same time using the SaltwaterAquarium.com defroster cup with insert 3D Printed by Vivid Creative Aquatics Removable screen and inner cup for...

ECO-BALANCE PROBIOTIC BACTERIA -- H2O-PURE Choose the size best suited for your system:4 oz bottle treats 120 gallons (454 liters)8 oz bottle treats 240 gallons (908 liters)16 oz bottle treats 480 gallons (1,817 liters)32 oz bottle treats 960 gallons...

Mount your Neptune APEX display in style. with this new APEX Display Holder. Simple Installation Features a simple mounting slot for super easy to mounting and aligning. This kit includes the mount and a mounting screw.

The Double Hole Frag Rack fits just about anywhere! It is perfect for adding just a bit more space to house corals without unsightly distractions. Holds plugs up to 1.5in with stems up to 0.5in. Colored racks come with silicone center lockers, and...

Our sand-sized Super Naturals are now Super Natural “Aquascapes”. Each bag contains a premeasured dose of beneficial bacteria to help start the cycling process. There are 8 colors to choose from, including new Midnight River. All natural,...

The deepest & widest Plug & Play NANO system The MAX NANO G2 XL comes fully equipped with everything needed to sustain a reef aquarium, sparing you from dealing with component selection or compatibility. MAX NANO G2 XL 33 gal Total system...

Coral pictured is an example of what will be sent to you. If you are looking to start buying coral online to add to your reef or fish tank, this is the best beginner LPS coral. Fascination Favia is an eye catching coral. It has a bright lime-green...

Blue Eyed Cardinalfish 2" - 3" in size. Blue Eyed Cardinalfish or Zoramia Leptacantha is also known as the threadfin cardinalfish or blue streak cardinalfish. These fish do well in schools of 3 or more. *Photo is a representation of the fish...

Based on our Benereef formula, now in a pellet form for convenient feeding and automatic feeder use. Benepellet Reef is scientifically engineered to optimize nutrients for your entire reef system. Bioavailability an nutrient absorption help maintain low...

Dimensions:  6in x 2in OR 1.25in   Includes: 2 Swappable Rack Options, 4 Hole or 8 Hole Thumbscrews Strong Magnet Bar   The Slimline Small Frag Rack [4 + 8 Hole] is a great set up for any size tank. You can easily...

An eye-catching coral Acropora species that makes a strong visual impression in the home aquarium. Under warmer lighting spectrums, this coral’s shockingly bright green polyps and purple tipped branches look fantastic. Adding strong actinic...

This UPGRADED Rack has 3x Magnets that are DESIGNED to hold on 3/4" Glass! PREMIUM FRAG RACK - MEDIUM Holds up to 20 Frag Plugs Dimensions: 10" x 4" NEW FEATURES: Slip and Scratch Resistant Magnet Bar Removable Magnet Bar - Swappable with...

The G2 Reefers come with new and improved water management, extra-fortified cabinets & aquariums, a REEF-SPEC ReefMat® ready sump, extended warranty plans, and are available in a huge variety of sizes, to fit any space.  REEFER G2...

Laura’s Purple Polyp is a compact branching coral that displays a beautiful emerald green base coloration. However, the real highlight of this piece is the teal tipped branches and bright purple polyps. We purchased this coral in 2011 as an...

The ORA Confusa is a horizontal plating Montipora with very pronounced ridges covering its undulating surface. The overall green coloration is interrupted between the ridges by small brown polyps while the plate edge and new growth are intense...

FL!PPER's DEEPSEE Spotlight easily attaches to any DeepSee Magnified Viewer and has a precisely focused torch-like beam ideal for spying on all your nocturnal creatures! Rechargeable LED SpotLights for Use with ALL FL!PPER DeepSee MAGNIFIED Viewers...

The XR15 Radion but now for freshwater aquariums Freshwater Spectrum & Lunar light Mobius Compatibility Active Quiet Cooling Pre-Loaded Spectrum Configurations 90 Watts Dimensions 7" x 7" x 1.4" In the Box Radion Light...

The Perfect Low Budget Beginner Aquarium Kit.  This is a great way to get started in the hobby, everything included will help you get started with a fish only saltwater aquarium. (Fish, Corals & Inverts are NOT INCLUDED) Upgrades over the...

Coral pictured is very close to WYSIWYG. If you are looking to start buying coral online, to add to your aquarium, this is a great beginner large polyp Stoney coral. ACI Cultured Funky Turtle Goniastrea Maze . This is a fast growing encrusting...

Purchase and return this item within 30 days, your purchase will be refunded minus the restocking/rental/shipping fee of $100. All rental products have a different fee based on the retail cost of the items.  30 Days begins from the date of purchase,...

SCUBA PRESET is a submersible electronic heater pre-set to 77°F / 25°C to ensure a perfect, consistent temperature for your aquarium with a 5 year warranty. They can be installed in all types of aquariums to simulate the natural...

Build a welcoming environment with the most advanced AIO (All in one) aquarium in its class. Expanding on the safety features of our award-winning aquariums, the Fusion Pro 2 Series comes standard with a built-in emergency overflow, adjustable water...

Dimensions:  6in x 2in OR 1.25in   Includes: 2 Swappable Rack Options, 4 Hole or 8 Hole Thumbscrews Strong Magnet Bar   The Slimline Small Frag Rack [4 + 8 Hole] is a great set up for any size tank. You can easily...

Choose your own rack with the Modular Frag System! The PNW Modular Frag System allows the perfect placement and adjustablity for your prized frags! The base magnet and screw fit into multiple different top pieces from 1-3 frag holes to allow you to...

The Orange Setosa is an awesome Montipora species with a distinct growth form among SPS corals. This coral is famous for its intense orange coloration but it can appear pink when placed under very intense lighting. As the ORAnge Setosa colony grows, it...

The VarioS 10 is a pressure-rated circulation pump that features a detachable controller, a high-quality ceramic shaft and bearings to reduce wear and tear, and the latest variable speed flow technology for refined control, enhanced...

The ORA Tri-Color Valida is a beautiful coral that is primarily purple in color.  As the Tri-Color name points out it also has green polyps and a green or brown base.  ORA has several slightly different Valida variants in cultivation. While all...