the most energy eficient and easy to install. I have a Hydrothruster that was donated, but i heard they use alot of wattage, and i have to find one that is inexpensive to buy and to run. its going on a marineland mars sump.
Well im guessing your doing an overflow to a sump for the tank. I picked up a reeflo snapper for 300 (not a gold) i love it, super high flows and pretty quiet/efficient