the filters that come with the kits only filter the water 5 times per hour, so you'll need to get another filter so your water gets filtered more often.
i havent had one of them before, i use penguin filter and cascade filters.
I have one that is good for up to a 30g tank. Now it does work pretty good and seems to be pretty quiet. The only problem I have ever had with it is it will not always start back up after plugging it in. I have to kind of fiddle with it first then it starts. Other then that is works nicely.
On a side note, I have moved this to the correct area.
I just set it up, and water flows from it the whole time, so why do you say it only filters 5 times an hour? Is it going to stop the flow of water soon, and is that why it's 5 times an hour?
My vote is, run the powerfilter in conjunction with an Undergravel Filter. Put the powerfilter intake in the intake tube of the UGF.
Having that much flow cuts down on the amount of "gunk" that forms underneath the UGF since it's going to get sucked up by the powerfilter. Doing this will also reduce the load on your powerfilter a bit. Don't forget to gravel vacuum (it's important for any tank), and your filtration will be just fine.
heh, doing this in my tank gets some pretty good results (for a 55 gallon tank). I've had snails that got under the UGF plates get sucked up to and stuck on the powerfilter intake.