I went with the version 3 and my way of thinking is that with a 6' long tank I would always have some flow in each end of the tank. Time will tell if I made the right choice but it looks good so far. When I first plugged in the pump it was definately more flow than I was anticipating as I was not paying attention to which direction my outflows were pointing and one was pointing straight up. Water was coming out of the top of my aquarium and shooting about 6" over the top. Lucky for me it was staight up so it just fell back down into the tank.
|