filter system help

I have a 29 gallon tank w/ about 20-25 pounds of live rock, 20 pounds of live sand, a rio aqua pump/powerhead (mini 50), a H.O.T. Magnum Bio-Pro System (250 gallons per hour). I am very confused about what type of filtration to use because in my research people are recommending different...

I have a 29 gallon tank originally setup for freshwater. I switched it to a saltwater around March, 2008. I have around 20lbs of live rock, 1 humu humu trigger, 2 small anemones, 1 false pecu clown, 1 damsel, 1 camel shrimp, 5 blue legged craps, 1 sand sifting star fish, 1 turbo snail, 1...