The filter in that kit your talking about at walmart sucks. I have a ten gallon SW
set up and have got away with not having a powerhead by using a HOB
filter rated for a 20-60 gallon. I have it sitting right in the middle on the back wall of the tank and it produces perfect current to the whole tank. I used a skilter 250 but I would say the regent 20-40 filter that sales for $30 at walmart would be just as good. Also the kit at walmart has Incandlescent lights. If it were me I would peice my own kit together.
heater - 13.99 walmart
filter(regent stated above)- 29.99 walmart
Flourescent hood - 19.99 walmart
alittle more expensive, but I started my sons barb tank in one of those kits. Within 6 months the only peice I was still using was the tank.
just my 2 cents