I think these are the kind of filters I am looking for.(All prices from Petsmart.com ) Please pick the filter that you feel is the best.
EHEIM Liberty Power Filters
Easy to set up and simple to maintain, the Liberty power filters come in three models: Liberty 100 gal./h for aquariums up to 20 U.S. gallons; Liberty 150 gal./h for aquariums up to 35 U.S. gallons; and Liberty 200 gal./h for aquariums up to 50 U.S. gallons.
The advanced 3D technology is based on a disposable pleated carbonized cartridge that provides 100% more mechanical and chemical filtration. It traps minute dirt particles while absorbing liquid impurities, organic compounds and odors. Eliminating toxins on contact, the bio-foam cartridge completes the three-stage filtration. To ensure long-term biological filtration, cartridges can chaged individually in order to maintain beneficial bacteria colonization
EHEIM Liberty Power Filter 200 for Aquariums up to 50 Gallons $27.99
Emperor Power Filters
This is the first power filter to combine high-end performance with multiple filtration options. Filter features not one pump (as in ordinary power filters), but two separate water pumps. The Flow Pump directs water through the high-capacity Emperor Rite-Size Filter Cartridges and Media Containers. The BIO-Pump then pressurizes and sends streams of pre-filtered, oxygen-rich water through the adjustable spray bars to power each BIO-Wheel. Ready-to-use cartridges have more mechanical and carbon filtration than any other cartridge. Provides superior biological filtration. Filter cartridges sold separately.
400 400 gal./hr. up to 80 U.S. gallons Two Rite-Size "E" Filters; Two 4 oz. Refillable Media Container Spray Bar Driven BIO-Wheel 601488 Emperor Power Filter 400 $42.99
Penguin BIO-Wheel Power Aquarium Filters by Marineland
Compact aquarium filters feature the rotating BIO-Wheel wet/dry biological filter, proven to remove ammonia and nitrite faster. Self-starting pump restarts automatically after shut off. Designed to be leak proof and easy to maintain. Flow rates are certified accurate. UL listed.
330 330 gal./hr. up to 70 U.S. gallons Two Rite-Size "C" Filter Cartridges and Two BIO-Baskets 601853 Penguin BIO-Wheel Power Filter 125 gph $18.29
Proquatics Power Filters
Proquatics Power Filters have been designed and tested by leading aquatics experts to provide years of reliable service. Along with state-of-the-art mechanical, chemical and biological filtration, there is an extra media chamber that you may customize with the media of your choice. Adjustable strainer opening and a flow control knob prevent the damage of small or delicate fish. These filters provide quiet, efficient operation and are UL and CUL approved. Remember to choose a filter appropriate for your aquarium size and fish load. Made exclusively for PETsMART.
603599
Proquatics 300 Power Filter for 55 to 75 Gallon Aquariums $39.99
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