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Black Friday: The Wait is Over! You've been waiting all year for this! Don't miss HUGE once-a-year savings on thousands of your favorite aquarium supplies! And, of course, if you have questions about the hobby or any of the items we carry, by all means reply to this post or give us a ring...

Will still have hundreds of more deals coming, but unfortunately I do not believe either of those will be discounted. Sorry about that! Hopefully we'll have something else cool you are looking for!

A Special Video Message + 15% Off Sitewide What we are most thankful for on this Thanksgiving holiday is YOU, our customer. black friday cyber monday

Soon! We are expecting to have them toward the middle or end of December. With extremely similar outputs to T5's, an average energy savings of 45%, lower heat and up to a 8-year usable life (3-year manufacturer's warranty), we are very excited to try them out ourselves!

Pre-Order Euroquatics E5 Retrofit T5 LED Lamps Your T5 will never be a T5 again! The E5 is designed to work in sync with your original T5HO fixtures. These unique products showcase features that create an eco-friendly, longer lasting aquarium lamp. This new spin on an old design makes T5s a...

First up, save 15% off sitewide on thousands of items now through Cyber Monday: Next, out today, is early access to some of our 2015 Black Friday deals, including 10% off Trigger Systems and 25% off Korallen-Zucht: We also have 80+ items that are already on sale, no coupon required!

Pre-Black Friday Blowout: 15% OFF SITEWIDE Why wait? Take advantage of Pre-Black Friday discounts on thousands of aquarium products with coupon BLACKFRIDAY2015 (some exclusions apply)

VIDEOS: AquaMaxx FR-Series Media Reactors Check out the new hang-on (FR-SE) and in-tank (FR-S) reactors from AquaMaxx, perfect for your carbon, GFO or biopellet media.

Build Your Aquascape, Install a HOB Refugium + Tunze Skimmer Sale PLUS save 10% on live & dry rock and the cool, controllable Aqua Medic EcoDrift

VIDEO: How to Mix Saltwater Many of us start by purchasing saltwater from a local fish store for water changes, which does have its benefits—but also leaves some mystery in terms of the quality of water and what is actually going into your tank. Mixing your own saltwater at home is, in fact, a...

Happy Veterans Day! Get 11% off your order until 7 pm PST this evening at Marine Depot with coupon HEROES You can also save 11% off your order at Marine Depot Live until midnight tonight with coupon THANKYOU

Mail-In Water Tests, Build Rock Structures and Improve Flow PLUS Lower nitrates, phosphates and remove aquarium waste with today's featured items!

HONORING ALL WHO SERVED Enjoy 11% off all corals, starfish and anemones @ Marine Depot Live until midnight 11/11/15 with coupon code THANKYOU FREE shipping on all orders $200 & up! Here are some of our latest additions (WYSIWYG) Blue Linckia Starfish Acropora Mini Colony Coral Bleeding...

Big tank skimmers + water change essentials New big tank skimmers from AquaMaxx just arrived plus save some dough on water change essentials like RO/DI systems, refractometers, pumps and gloves.

Get organized, most viewed tanks + 15% off all heaters PLUS Kessil AP700, Most Searched Lights, Reactors and Customer Reviews!

VIDEO: Which ATO is right for you? In today's video, we explain how the hobby's most popular ATO systems work, from the most basic to the most advanced, to help you determine which system will best fit your tank and budget. Already run a ATO? Please reply with the make/model and how you like...

New @ MD: Reactors, Frag Racks, Skimmers and MORE! PLUS Sump Giveaway, Items Under $50, Nano LEDs and Customer Reviews

15% off RO & RO/DI Systems, Booster Pumps, Replacement Cartridges, TDS Meters and MORE Use coupon code PUREH2O during checkout to redeem Remove harmful impurities from tap water before they enter your tank! Want to learn more about reverse osmosis systems? WATCH OUR YOUTUBE PLAYLIST

Keep your tank safe when disaster strikes! With all of the time, money and effort we dedicate to becoming excellent stewards of aquatic life, investing in backup equipment and having backup saltwater prepared are precautions every hobbyist should take.

BIG deals for BIG tanks We've slashed prices up to $210 on AquaMaxx skimmers and calcium reactors for large tanks. Everything below ships for FREE. Need more time to pay? Try PayPal Credit! Have you entered our latest giveaway?