well deffinately my next addition is a skimmer, and i'll get rid of the test strips and get a better test kit, what do you recommend?? As far as why i bought the bio-wheel filter was to get a little more water movement as well as a little bit more filtration, and i got a pretty nice deal on it, which came to be cheaper than a powerhead. I also went to walmart, and they don't carry RO/DI water, so that's out of the question for me...