REEF DX 100.3
REEF DX 100.3
REEF DX 100.3

Waterbox Aquariums

REEF DX 100.3

Sale price$2,899.00

SKU: 350075
• Dimensions (LxWxH): 900 x 600 x 550mm (35.4"×23.6"×21.7")
• Height with Cabinet: 1450mm/57"
• Display Volume: 271 L/71.7 gals
• Total Volume: 402 L/106.1 gals
• Glass Thickness: 12mm
• Includes: Aquarium, Cabinet, Sump, Plumbing Kit, Filter Socks, Sock Silencers
View Full Specifications
Only 2 units left
Or Monthly Installments


Our Most Loved Aquarium

Waterbox REEF™ systems provide hobbyist a customizable foundation to design their dream aquarium. The most loved aquarium in the industry makes you fall in love again with aquatics.

Full Glass Overflow

Overflow boxes are constructed entirely of glass with water-etched weir teeth.

Dual Adjustable Return Nozzles

Each side of the glass overflow box features adjustable return nozzles for precise water agitation.

Overflow Lid

Each Waterbox has an overflow cover with unique branding.

Ultra Low Iron Glass

Our aquariums are all manufactured using Low Iron Ultra Clear glass that is diamond beveled providing 91% transmittance.

High Strength Silicone

Manufactured using german made Wacker silicone will provide your aquarium with the longevity it needs.

Standard 90 Degree Joints

Manufactured using the standard aquarium manufacturing joints for maximum durability and strength.


Plumbing Simplified

Our engineers have designed the REEF™ DX with a ready to assemble plumbing kit that provides easy installation without any gluing required.

Quick Connect Assembly

Assembly is quick and easy with no gluing required.

Precision Gate Valve

Controls the flow through the drains, ensuring quiet operation.

Saltwater Mixing Conversion Plumbing

Includes additional plumbing to convert ATO reservoir into a saltwater mixing container

Safety Drain

Diverts water into the filtration compartment preventing an overflow, in the event of a clog.


A Sump System for the Pros.

The REEF™ DX system shines above the rest with our thoughtfully designed, sized and placed sump system.

Adjustable Baffle

Skimmer and refugium chamber adjustable baffles to control water flow.

Heater Holder

Ensure stable heater placement with attached holders.

Dosing Tube Connectors

Included are six dosing tube connectors.

Probe Holders

Affixed probe holder for four tubes.

Filter Sock

Removable sock holder which holds two 4" socks.

Filter Sponge/Pad Holder

Included is a holder designed to hold optional filter sponges or filter pads.

Acrylic Covers

Sump compartment covers assist in reducing evaporation, salt creep and noise.


Technical Specifications

Product Model REEF DX 100.3 REEF DX 130.4 REEF DX 180.5 REEF DX 220.6
(Length x Width x Height)
900 x 600 x 550mm 1200 x 600 x 550mm 1536 x 643 x 550mm 1836 x 643 x 600mm
35.4"×23.6"×21.7" 47.2"×23.6"×21.7" 60.5"×25.3"×21.7" 72.3"×25.3"×23.6"
Glass Thickness 12mm (1/2") 12mm (1/2") 15mm (3/5″) 19mm (3/4")
Water Height 535mm/21.1" 535mm/21.1" 535mm/21.1" 585mm/23.0"
Aquarium Volume 271 L/71.7 gals 364 L/96.3 gals 494 L/130.5 gals 632 L/167 gals
Aquarium Weight 105.0 kg / 231.5 lb 126.0 kg / 277.8 lb 195.0 kg / 430.0 lb 277.0 kg / 610.7 lb
Glass Material Ultra-clear glass
Transmittance 91%
Sump Sump Type Fully Covered Low Evaporation Refugium-ready Acrylic Sump
With Refugium Chamber X X X X
Water Height Adjustable Double Baffles, for Skimmer Chamber and Refugium Chamber respectively
RO Water Height Control Height Adjustable Floating Ball-valve in Pump Chamber
Sump Dimensions 800 x 440 x 380mm 800 x 440 x 380mm 850 x 475 x 380mm 850 x 475 x 380mm
31.5" × 17.32" × 14.96" 31.5" × 17.32" × 14.96" 33.46" × 18.7" × 14.96" 33.46" × 18.7" × 14.96"
Sump Volume 115 L/30.3gals 115 L/30.3gals 132 L/35gals 132 L/35gals
Sump Weight 19.0 kg / 41.9 lb 19.0 kg / 41.9 lb 26.0 kg / 57.3 lb 26.0 kg / 57.3 lb
Holder for Heater 1 1 1 1
Dosing Tube Quick Connectors 6 x 1/4"(Φ6.5mm) 6 x 1/4"(Φ6.5mm) 6 x 1/4"(Φ6.5mm) 6 x 1/4"(Φ6.5mm)
Floating Probe Holders 4 4 4 4
RO Reservoir Height Control Height Adjustable Floating Ball-valve in Pump Chamber
Holder for Bubble Absorbing Sponge/GFO Bag in Pump Chamber X X X X
ATO Independent ATO Tank 16 L/4.2 gals 16 L/4.2 gals 73 L/19.3 gals 73 L/19.3 gals
ATO Weight 8.0 kg / 17.6 lb 8.0 kg / 17.6 lb 13.0 kg / 28.7 lb 13.0 kg / 28.7 lb
Sea Salt Dissolving and Mixing - - X X
Plumbing Pre-assembled Piping with Emergency Overflow X X X X
High Precision Flow Valve X X X X
High Flow Return DN20 (25mm/1") DN20 (25mm/1") DN25 (32mm/1-1/4") DN25 (32mm/1-1/4")
Dual Return Directional Nozzles X X X X
Non-Return Valve Protection X X X X
Accessories 4“ 225 Micron FELT Socks 2 x 105mm/4"  2 x 105mm/4"  2 x 105mm/4"  2 x 105mm/4" 
Filter Sock Silencers x 2 x 2 x 2 x 2
Noise-reducing Overflow Lid X X X X
Manifold 15 (Optional) Single Outlet Single Outlet Single Outlet Single/double Outlet
Mesh Aquarium Lid (Optional) MT REEF/RDX 100.3 MT REEF/RDX 130.4 MT REEF/RDX 180.5 MT REEF/RDX 220.6
Cabinet Cabinet Model UV 3624 UV 4824 UV 6025 UV 7225
Cabinet Dimensions
(Length x Width x Height)
900 x 600 x 900mm 1200 x 600 x 900mm 1536 x 643 x 900mm 1836 x 643 x 900mm
35.4"×23.7"×35.4" 47.2"×23.7"×35.4" 60.5"×25.3"×35.4" 72.3"×25.3"×35.4"
Sump Compartment Inner Dimensions 810 x 560mm 768 x 560mm 915 x 605mm 815 x 605mm
31.9"×22" 30.2"×22" 36"×23.8" 32.1"×23.8"
Material 18mm solid plywood
Paint (side & front) PU Painting
Color W-White, B-Black
Cabinet Weight 58 kg / 127.9 lb 69 kg / 152.1 lb 84 kg / 185.2 lb 105 kg / 231.5 lb
System Height with Cabinet 1450mm/57" 1450mm/57" 1450mm/57.1" 1500mm/59.1"
Total Volume 402 L/106.1 gals 495 L/130.7 gals 699 L/184.7 gals 837 L/221.2 gals


Join us on Facebook

Join the Waterbox Official Facebook group to get inspired. Post questions, ask for help, or just show off your aquarium. The community is here to help and join you on your journey to a successful and healthy aquarium.