Special Offer: Receive one free item with any order. Simply add the item to your cart—once your order subtotal exceeds...

This 5" x 8" x 1" zippered neoprene pouch is great for safely storing Apogee meters, microCache devices, and sensors....

The New AI Prime 16HD shares the same cluster as the Hydra 32HD and Hydra 64HD. The new Prime will...

Special Offer: Receive one free item with any order over $30.00. Simply add the item to your cart—once your order...

The Finnex HMK Titanium Aquarium Heater Series Introducing the Finnex HMK Titanium Aquarium Heater - Elevate Your Aquatic World to...

Fritz Super Sacks are premium quality refillable and reusable mesh bags suitable for most types of media - customize your...

  Most Impressive: More LEDs More PAR More Spread Improved Optic Design Improved Water Resistance Thinner Form Factor Dedicated Moonlight...

Combining the Spectrum Nutrition Formula with additional, naturally occuring Beta Carotene for bright, vibrant reds and oranges in fish that...

50% OFF, these expire 6/2025, acutally probably good for another 6 months after that.   Silicate Test Silicate occurs especially...

BRAND NEW EXPIRED, SAVE 60% - Factory sealed, expired dry food.  This expired on 2/2025, but it should still be...

CaribSea LifeRock Shelf Rock 40 lb LIFEROCK Real aragonitic base rock, not cement, no curing. Extensive macro and micro-porosity infused...

Two Little Fishies Little Reactor is the latest and smallest Two Little Fishies reactor. This 7" tall reactor is designed...

Submersible Aquarium Fluidized Bed Filter   • Tumble Aquarium Filter: - Imitates natural filtering, uses new material, cultivates bacteria, no...

BRAND NEW CLOSEOUT SALE    ULTRA HEATER HEATING EXPERT A new generation of aquarium heaters distinguished by their impact-resistant plastic...

Your Choice Aquatics Bio-Plate Filter Media - 2 Pack High Performance Bio Filter Media   Features - Increased Beneficial Bacteria...

The flows you chose Only you know what is best for your aquarium. Creating specific directional flow around sensitive corals,...

  Most Impressive: More LEDs More PAR More Spread Improved Optic Design Improved Water Resistance Thinner Form Factor Dedicated Moonlight...

BRAND NEW EXPIRED, SAVE 60% - Factory sealed, expired dry food.  This expired on 2/2025, but it should still be...

BRAND NEW EXPIRED, save 60% - Factory sealed, expired dry food.  This expired on 8/2025, but it should still be...

Get your replacement reagents for your HI781 Marine Nitrate Low Range Colorimeter today. These high-quality reagents are manufactured in our...

OPEN BOX RETURN- SAVE 15%   World’s Smallest Dual-Sensor Aquarium Auto Top Off   Features: NEW! Controller programming & circuitry...

Please NOTE: Expired 06/2025 CaribSea Arag-Alive!" CaribSea has seven carefully selected Live Sand products to help you create the authentic...

BRAND NEW CLOSEOUT SALE   ULTRA HEATER HEATING EXPERT A new generation of aquarium heaters distinguished by their impact-resistant plastic...

AquaScraper Float Acrylic Algae Scraper Product Details and Features Works great on glass or acrylic aquariums, without scratching the surface....

The New AI Prime 16HD shares the same cluster as the Hydra 32HD and Hydra 64HD. The new Prime will...

Kolar Labs 454g Crystal Cal Carbon Catalyic Kolar Labs Crystal Cal is a premium, laboratory grade, granular activated carbon designed...

Pro Plumbing Kit ESHOPPS delivers the total package in simplicity and sophisticated design. Dedicated specifically for use with the Eclipse...

Carbon Block Pre-Filter Cartridge for the RO Buddie. Features: Designed for use with the RO Buddie 50 & 100 GPD...

Nitrogen + Molybdenum solution to maintain optimal N:P ratio in your aquarium. Dose as needed to maintain NO3:PO4 ratio between...

SAVE 60%- STILL GOOD TO USE- EXPIRE 6/25   Easily Deposit Millions of Live Reef-Bacteria and Enzymes into a Reef...

Reef Factory Dosing Pump Holder (1 unit) Mounting bracket for one dosing pump. With the shelf, you can aesthetically and...

Dosing pump Head for Dosing pump / Dosing pump X3 / Dosing pump X4 / KH keeper Plus (blue) Head...

3 Pack - Total of 3 Nitrate Filtration Pads Nitrate + Nitrite Pad - 18" x 10" The Seapora Nitrate...

OPEN BOX RETURN- SAVE 15%   Net Cover Profile | Item codes R42091   91cm/36″- R42091 -2   

Reaction HOB Hang-On-Back Aquarium Filter Product Details and Features JBJ Reaction Power Filters hang compactly on the back of your...

Freshwater Spectrum The Prime Freshwater is capable of producing a limitless number of spectral combinations to fit your tank’s exacting...

Freshwater Spectrum The Prime Freshwater is capable of producing a limitless number of spectral combinations to fit your tank’s exacting...

NEW OPEN BOX RETURN - Brand new condition. SAVE 15%   Clip-On UV Sterilizer Clear water is just a snap,...

OPEN BOX RETURN  - SAVE 25%- might have been used but looks pretty clean.  Green Killing Machine - Internal UV...

MECoral 32 oz Kh liquid solution is ready to use.  MECoral uses only Pharmaceutical Grade raw material to achieve the...

Pro Plumbing Kit ESHOPPS delivers the total package in simplicity and sophisticated design. Dedicated specifically for use with the Eclipse...

DRY VERSION - This rock was factory cured, wrapped and then dried or slightly damp.  It's ready to be cured...

Gourmet Grinder – Improving the Daily Grind Long work hours and busy schedules no longer prevent you from implementing a...

Bubble Magus Liquid Dosing Container 2.5L / Stackable

Next-generation regenerable nitrate adsorption resin effective in marine and freshwater aquaria; does not require soaking in buffered water prior to...

  Flatworm Control Flatworm Control is an exceptionally fast and effective treatment for controlling Flatworms in saltwater aquariums.  Flatworm Control...

MISSING LABEL- SAVE 15% Icecap Alternating Gyre Mode Cable   This 6.5ft cable allows you to run your Maxspect Gyre...

MISSING LABEL- SAVE 15% PRE-FILTER FOR PUMPS 9.5 THRU 36 (NO FOAM)