Crystal Clear Water
The Bio-Sump™ is the latest in filtration technology pioneered by MRC®.
A sump can be and should be much more than a simple box that holds components. Done right, and it will be a powerful filtration tool that will keep your aquarium in optimal condition.

Simple
Silence
The inset lid will keep noise and splashing inside the sump, giving you a clean and quiet operation.
Precision
Unlike traditional bio-ball sumps, the MRC® Bio-Sump™ will never become a nitrate factory. The media also never needs rinsing, cleaning or replacing.
Detail
Overview
The most advanced filtration sump on the market, available in a compact package.
Includes all the great features of the larger models without sacrificing room for your protein skimmer and internal return pump. Rounded off with our bubble crushing filter pad.
As with all MRC® sumps, the highest quality and finish you’ve come to expect applies.
Specs
Dimensions: 24″ x 16″ x 16″
System capabilities: 150 US gal
Water Capacity: Aprox 26 US gallons
Thickness: 3/8″ clear cast acrylic
Water inlet size: 2 x 1″ SOC Unions
Max Flow Rate: 900 GPH
Mechanical Pre Filtration: 2 x MRC4200 Filter Sock
Bio-media: Included
Inset lids: 1
Skimmer Chamber: 10″ x 15 1/4″
Return Chamber: 5″ x 15 1/4″


Overview
Our most popular Bio-Sump® model.
Tons of space for internal protein skimmers or reactors and submersible pumps. Bubble crushing baffles and silent operation.
As with all MRC® sumps, the highest quality and finish you’ve come to expect applies.
Specs
Dimensions: 36″ x 18″ x 18″
System capabilities: 250 US gallons
Water Capacity: Aprox 50 US gallons
Thickness: 3/8″ clear cast acrylic
Water inlet size: 2 x 1″ Bulkhead
Max Flow Rate: 1500 GPH
Mechanical Pre Filtration: 4 x MRC4200 Filter Sock
Bio-media: Included
Inset lids: 2
Skimmer Chamber: 12 3/8″ x 17 1/4″
Return Chamber: 6″ x 17 1/4″
Overview
The Bio-sump® model for the most serious aquarist.
Tons of space for internal protein skimmers or reactors and submersible pumps. Bubble crushing baffles and silent operation. Heavily favored by public aquariums and high-end installers.
As with all MRC® sumps, the highest quality and finish you’ve come to expect applies.
Specs
Dimensions: 48″ x 18″ x 18″
System capabilities: 450 US gallons
Water Capacity: Aprox 67 US gallons
Thickness: 3/8″ clear cast acrylic
Water inlet size: 2 x 1.5″ Bulkhead
Max Flow Rate: 2500 GPH
Mechanical Pre Filtration: 2 x MRC7200 Filter Sock
Bio-media: Included
Inset lids: 2
Skimmer Chamber: 20 3/8″ x 17 1/4″
Return Chamber: 6″ x 17 1/4″

Find An Authorized Dealer
Purchase your +Series™ Sump from an authorized MRC® retailer today.