MARINE EX 90.3
WB_MARINEEX_90_3_1 · White / System Only
Building on the MARINE X platform, the MARINE EX 90.3 features a low-profile external overflow system paired with professional-grade acrylic sumps—delivering a sleeker display and an advanced filtration layout. Marine-grade...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.
Building on the MARINE X platform, the MARINE EX 90.3 features a low-profile external overflow system paired with professional-grade acrylic sumps—delivering a sleeker display and an advanced filtration layout. Marine-grade cabinetry offers superior corrosion resistance, making the MARINE EX perfect for serious reef keepers seeking both functionality and sophistication.
Build around the MARINE EX 90.3.
It's already in your system below. Add the flow, filtration and dosing around it and the discount starts working — tiers climb as the build grows, and the reef meter fills with it.
Pick the right one, not the biggest one
The honest line-up from aquariums & stands. Most buyers reading this page should buy the middle column.
Red Sea Reefer XL 425 Aquarium System
MARINE EX 90.3
Waterbox Reef 180.5 Aquarium SystemAsked before checkout
The questions our support inbox actually gets.
Does it ship quickly?+
Orders placed before 2 PM ET on a business day leave the same day. Tracking is emailed the moment the label prints.
What if it's the wrong fit for my tank?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: tell us your tank first and we'll spec the system for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue.
How does the bundle discount work?+
Add items in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole system, applied at checkout.