i need help MFK. I'm having trouble deciding what powerhead or pump i should use in my 55g overstocked hexagon. also with finding the right angle to position it in to work best w/out disturbing the intake on my overflow.... I have the aqueon700 installed but its seems its overdoing it....is that possible? I like the way the powerhead 301 works, but it says its for a smaller tank (30g). ALSO im using the p660 as my return pump from my HOB.the intake flow rate on my HOB seems to be a lil too slow for the p660. WHAT DO YOU GUYS THINK I SHOULD DO???? any advice will be great. THANKS MFKER'S.