I have a 29 gallon kit I got from wally world and it has a aqua tech filter with it. I didn't care for it to much so I added it as additional filtration to my 36 gal tank and bought a aqua clear 70 for the 29. I love aqua clear filters . I also have to 5 gallon hex tanks from walmart and the filter on them is a small one integrated into the hood. They do an ok job. I have one as a
betta tank and the other as a quarentine tank with 6 small harlequin rasboras in it at the moment. ( new fish not sick fish..lol) They are good for betta as they don't kick up a lot of current but I don't see they would be able to keep up with a big job ( but then the tank is only 5 gallons to).