Flow accelerator swirl educator

[kamloops_reefer]

Originally Posted by jason604

It's for pushing water not sucking tho? Unless ur return pump turned off and it siphoned. But I am going to put a check valve on my return line to prevent this

water gets sucked in from the back side, hence how these work, if a fish is swimming near your loc line return in the display tank, there is a chance he will get sucked in - just like mine did.

but sometimes this aquarium is all about taking chances. it seemed to have worked for me though!