If you have an all-in-one aquarium that's between 20-65 gallons, the IceCap AIO 240 Protein Skimmer is a great option. It has a slim profile and can be hung within the aquarium's dedicated filter chamber. You can also adjust the skimmer's height to get the desired amount of waste collection. This product is expertly made using durable, top-notch acrylic molding. Every part of it has been designed to ensure safety in marine environments and to deliver the most advanced foam fractionation technology with superior quality. When examining the IceCap's AIO 240 core, you'll discover the 12V DCair 400 skimmer pump that's intended to deliver reliable and efficient results. Adjusting the skimmer's collection output is a breeze thanks to the inline controller, which allows you to fine-tune the pump's speed. The bioload of an aquarium refers to its ability to process waste in proportion to tank volume. Protein skimmers work best when properly matched with the bioload of the system. For a heavy bioload, this will work best up to 20 gallons. For a medium bioload, this will work best up to 45 gallons. For a light bioload, this will work best up to 65 gallons Specific Filtration Features for All-In-One Aquariums: Distinctive Square Body Adjustable Height Hanging Bracket Solid Construction Easy-to-lift Off Collection Cup Bubble Dispersant Chamber Novel Output Flow Efficient, Safe & Quiet DC Operation Disassembles for Easy Cleaning & Maintenance Technical Specs AIO 240: Skimmer Body/Reaction Chamber: 3inx2.25in Footprint: 2.75in x 3.625in Neck Size: .625in Total Height: 12in Technical Specs DCAIR-400 DC Pinwheel Pump: Power Consumption: 6 watts PSU Model: 1210 Output: 12V/1A Air Draw: 150lph / 5.25SCFH* Water Draw: ~53gph* *Air and water results will vary depending on the aquarium setup.