I am converting a 120 gallon Fowler tank into a reef. I have just gotten 2 3200 gph power heads to increase the water flow. Now where do I put them!-confused I know its best to have them facing lengthwise or :flood: but do I place them both on the same side? Or would it be best to make a circular flow with one one each side. Then there is the problem of depth :wacko: . If anyone has some tips on how to find the right placement I would be very appreciative.