Hang-on-back power filters and canisters, Marineland (Penguin and Magnum) is the absolute best for performance, maintenance and value. The Bio-wheels just can't be beat.
Having said that, anything 75g+, I'd put on a sump-type filter. I've custom made 2 of these for my tanks over the years, and have paid FAR less than I would have for store bought. For my 125g I've got a 800gph overflow box feeding a bio-ball filled, square shaped, old, plastic cat litter container with a grate and filter pad on top. The bucket is inside a 10g tank with a piece of acrylic, 1/2 the height of the tank, siliconed in as a divider/dam. On the other side of the dam is the heater and return pump (800gph). I've figured this cost me about $170. In addition to this, I am using a Magnum 350 canister (plumbed into the sump) for carbon/water polishing w/ a pleated cartridge, and I have a UV system split off of that @175gph. I understand this sounds like alot, but my fish load is ridiculous. My fish like to eat, and I like to feed them. In an average week, they'll go through 100 2-3" goldfish, 4-6 4" crayfish and about 1/2lb of pellets. With this set-up, in over 5 years, I've never had a single illness or problem with chemistry, but most people spend a LOT more for the same results.
So, if you've got a decent sized tank, take the sump route.
It's the best way to go, and with some creativity, it doesn't have to kill your bank roll.
BTW- I designed this tank to go behind a couch (hiding the openings in the back of the stand) and be viewed by both sides. The skimmer and returns are on the NARROW end of the tank (custom lid) against the wall. One return shoots straight down, while another has a piece of 1/2 vinyl tubing attached, which rides along, invisible, behind the top plastic frame to the other side of the tank, secured with heater holding suction cups. All this makes for a tank which has completely unobstructed viewing from BOTH sides...hope this sparks some creativity out there!
Having said that, anything 75g+, I'd put on a sump-type filter. I've custom made 2 of these for my tanks over the years, and have paid FAR less than I would have for store bought. For my 125g I've got a 800gph overflow box feeding a bio-ball filled, square shaped, old, plastic cat litter container with a grate and filter pad on top. The bucket is inside a 10g tank with a piece of acrylic, 1/2 the height of the tank, siliconed in as a divider/dam. On the other side of the dam is the heater and return pump (800gph). I've figured this cost me about $170. In addition to this, I am using a Magnum 350 canister (plumbed into the sump) for carbon/water polishing w/ a pleated cartridge, and I have a UV system split off of that @175gph. I understand this sounds like alot, but my fish load is ridiculous. My fish like to eat, and I like to feed them. In an average week, they'll go through 100 2-3" goldfish, 4-6 4" crayfish and about 1/2lb of pellets. With this set-up, in over 5 years, I've never had a single illness or problem with chemistry, but most people spend a LOT more for the same results.
So, if you've got a decent sized tank, take the sump route.
It's the best way to go, and with some creativity, it doesn't have to kill your bank roll.
BTW- I designed this tank to go behind a couch (hiding the openings in the back of the stand) and be viewed by both sides. The skimmer and returns are on the NARROW end of the tank (custom lid) against the wall. One return shoots straight down, while another has a piece of 1/2 vinyl tubing attached, which rides along, invisible, behind the top plastic frame to the other side of the tank, secured with heater holding suction cups. All this makes for a tank which has completely unobstructed viewing from BOTH sides...hope this sparks some creativity out there!