Eductor Valves

These valves use the laws of physics to supposedly increase the flow a pump puts out in an aquarium.

If a pump is rated at a certain volume per minute, this is supposed to increase that outgoing volume by 10-15%.

It is attached to the outlet side of the pump. It changes the outflow from a laminar one to one with more variable current.

Our Results

We tried several eductor valves and we haven't had quite the same benefits as the reviews indicated.

We didn't really notice any tremendous increase in the flow output. Now admittedly, we didn't measure it. But if the is a difference, it wasn't much.

Note author Richard Harker wrote a recent review on them and said that we could put corals closer to the pump. In our tanks, there are zones that are too close the pump for corals to grow as there's too much flow. We did test this and generally find that to be the case, that we could put corals a little closer to the pump outlet without blasting them away. But that's because the laminar flow was reduced and changed to a more intermittent variable flow.

All together, we didn't feel that eductor valves were worth the cost for the benefit they had.