Drawing A Blank...

[CannibalisticTurtle]

I want to increase the flow on one side of my 40 breeder but don't have the space for another powerhead since both the overflow and the return are on that side of the tank. I've seen something that you hook on the end of lock line that looks like an open sphere with a nozzle on the end. They somehow suck water in from around the sphere and in turn increases flow. For the life of me I can't remember where I say them or what they are called. Anybody help me out? Thanks,
-Stephen-

 

[slipknot23]

Penductor & Eductors

 

[CannibalisticTurtle]

Thanks! Anybody ever used one? Feedback, positive or negative?