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New For You + Best Buys Under $10 Tanks, Regenerable Resins, Sump Bundles, UV Sterilizers, and MORE!

7 Tank Build Ideas + What’s in the News? BUILD A TANK: 9, 12, 22, 32, 48, or 57 gallons!

We're PUMPED about the WaveLink and MightyJet! We’ve got photos, video, and speak to the company about their new WaveLink and MightyJet pump lines

https://www.youtube.com/watch?v=vQ-z_TUQ6Ls Robert's Secret Sauce for Growing Healthy Colorful Corals NEW VIDEO + 25% off Korallen-Zucht!

0% APR Financing: Abyzz, Maxspect, Reef Octopus, IceCap, AutoAqua, Giesemann, and CoralVue For a limited time, choose Affirm at checkout and pay over 3, 6, or 12 months from 0% APR for qualified customers when you purchase $300 or more of Abyzz, Reef Octopus, AutoAqua, IceCap, Maxspect...

https://www.youtube.com/watch?v=h5MIPzKC9-o Episode #1 : Reefer Deluxe 525 XL - NEW TANK BUILD! We're moving our livestock into a luxurious Red Sea aquarium!

AlgaGen’s Erik Stenn Tells Us Why We Should Feed PhycoPure SeaPro, The First Living Frozen Phytoplankton, To Our Reef Tanks—And Teases More Live Frozen Foods May Be Coming PhycoPure SeaPro is a live algae culture delivered to you in “suspended animation.” Once thawed, the phytoplankton...

New Project? Save 15% On Plumbing! New Articles! New Videos! New Deals! Use coupon BUILD to save 15% on plumbing for a limited time.

5 NEW VIDEOS! NanoBox, Aquatic Life, ATI, and MORE! Fast facts about our customers' favorite products!

The IceCap 1K Gyre Pump Is Here! Fully controllable linear flow for 20-50+ gallon aquariums

Hanna Makes Testing Fun, Fast, & Easy! Tired of matching colors to a color chart? Get an accurate digital reading with Hanna's water testing tools!

Quick Shipping Update (+ $5 off your next order!) Here's what happening this week @ MD :i_dont_get_it:

Choose Any Item: 15% OFF ENDS @ MIDNIGHT: 15% off the most expensive item in your order! PLUS: We are giving away 20 digital copies of Justice League!

Presidents Day Sale: 15% off the item of your choice! TODAY: Save 15% on the most expensive item in your order!

Perfect Pairs: Sweet Separately, Better Together! ❤ Happy Valentine's Day! ❤

Hey, Aquaman fans! We are giving away 20 digital copies of Justice League!

https://www.youtube.com/watch?v=E4wWEQ7pkk4 NEW VIDEO: The Walt Smith Story Robert chats with Walt about his rich history in the marine aquarium hobby and the A.D.E. Project

Build a Tank: 2, 18, 22, 33, or 64 Gallons! PLUS: 10% off Majano Wands!

Tunze Fan Club: Top Picks We Know You'll ❤ Tunze is one of the hobby's most trusted brands. Here are our faves!

10% off Dosers + Skimmers! PLUS: Hybrid Lights BACK IN STOCK! Dependable equipment from Bubble Magus now on sale!