Filter suggestions for a 20 gallon

OK i'm home too late to see the Petsmart post and I did pass one but I was waaay too nervous driving in a big city to really get off the road I was on and risk getting lost (i'm not a very confident driver when I don't know where I am..)
So anyway I ended up getting a Marineland 20 Gallon Deluxe Bio wheel Kit. Which I am very pleased with I hope you guys think it is a good choice rather than going with bits and bobs I was very overwhelmed even having some things written down.
It comes with The Penguin bio wheel 125 power filter, full spectrum fluorescent lighting and a Dual Temp 100 watt precision aquarium heater.
And the usual bunk.. net, water conditioners, food, book.. etc.
I also bought a stingray stand with double doors.

I looked at the fish too, they had some beautiful dwarf gourami.
I wont be setting this up until xmas time so it will be a while before it has fish in it.
 
Re: Post 11
The Penguin filter listed on the main kit box is 125 upon closer inspection of the actual filter given it is the 150 i'm glad I was worried the 125 might not be enough for the 20 gallon.
 
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