Some of them really like them. The congicus likes to swim against the current and then double back to go darting effortlessly across the tank. There are two powerheads in the the tank, one pushing from right to left up front, the other from left to right in the back. Both are hyodor evolution 1400's. I mainly use them to get rid of dead spots that the aquascape creates. The gar especially love them.
You could always look up a day video, Zach. Things always seem way more difficult than they actually are.
