I'm currently looking for a water pump for my 10 gallon. I tried a Koralia nano (yes, based soley on the fact the word nano is in the title), and that proved entirely too strong. The only two I can find with under 100 gph capabilities is the ViaAqua 180 which puts out 80 gph, and the Hydor Pico Evolution Mini Pump 200 which puts out 70 gph. Anyone out there have experience with either of these, and are these in more of an acceptable range, GPH wise? Thanks for any help.