Features:
- Refiltration system that offers superior contact time with filter media and energy efficient pump lowers operating costs
- Quick and easy installation
- Filtration volume is up to 7 times larger than comparable filters
- Comes equipped with AquaClear Foam, Activated Carbon and BioMax and Cycle Guard for continuous biological filtration and superior water quality
- Ideal for aquariums up to 20 gallons
Mike's Take: AquaClear hang on back filters are one of my favorites for a few reasons. 1.) They are very quiet and reliable. 2.) They have adjustable flow (great for betta aquariums) 3.) Pleanty of room in the back for adding additional media. Generally, once my tank gets larger than 40 gallons, I like to move towards using canister filters because they can create more flow throughout the aquarium. These are still a great option for those who are looking for a more than adequate, reliable filter they can trust. I tend to use "more of less filter" than what the manufacturer recommends, depending on the tank size. For example, I would be ok using an AquaClear 20 on a 29 gallon (good balance of filter size and flow relative to tank size and dimensions). I would not use an AquaClear 20 on a 10 gallon tank (too much flow).
Additional Info:
The AquaClear Power Filter represents one of the most versatile hang-on filter systems available. The five models available provide a complete selection of flow rates for the most popular sizes of aquariums. The filter’s unique design allows for up to six times more media volume and the longest water to media contact time in the industry.
Sometimes delicate fish and plants require a more gentle water flow. The patented AquaClear re-filtration system allows you to control the flow rate without compromising filtration efficiency. When the flow rate is reduced, up to 50% of the water within the filter chamber is processed multiple times.
| Model |
 |
 |
 |
 |
 |
 |
|---|---|---|---|---|---|---|
| Capacity | up to 10 US Gallons | 5 to 20 US gallons | 10 to 30 US gallons | 20 to 50 US gallons | 40 to 70 US gallons | 60 to 110 US gallons |
| Size | 4.5 x 2 x 4 inches | 4.5 x 7 x 6.5 inches | 18 4.5 x 8.2 x 6.7 inches | 4 x 9 x 8 inches | 6.2 x 10.7 x 8.6 inches | 7.1 x 13.9 x 9.1 inches |
| Output | 80 US Gal/h | 100 US Gal/h | 150 US Gal/h | 200 US Gal/h | 300 US Gal/h | 500 US Gal/h |