This power filters comes equipped with adjustable flow control. A quiet, efficient motor. Easy disposable replacement cartridge. Permanent Bio-sponge stays in place while changing first stage filter cartridge. Also comes equipped with Bio-Falls wet/dry biological booster. This model filters 300 gph and is rated for tanks up to 80 gallons
cascade 300 power filter06/07/2012 Bydon watkins ordered & received filter as promised, minus an o-ring that keeps water in filter body rather the wood floor tank is sitting on. Kens had replacement to me in 72 hours even though box says do not call retailer! i was told of this legendary customer service, i laughed, i now believe! filter is extremely quiet. i am positive the advertised number it will filter up to 100 gallon tank is an equal, "extremely optimistic", barely moved water in my 80 gallon with flow valve open full, so to be sure i added a 2nd one. for the price and low noise i guess its still a good deal. same filter at my local pet store is more than double what ken's chargers for  filters.
Cascade 300 = 3 stars tops
Ken's = 30+ stars
Cascade 300 Power Filter
cascade 30007/10/2012 Bymike very decent price the only down side is that if you have a tall tank the intake tubes aren't very long there are extensions which i recommend getting i have three of these filters on my 140 gal cichlid tank