Aquaponics - Powerhead zero head test

The absurdly low energy aquaponics system I've been working on, will probably use a power head to shift water between a fish tank, and a constant flood grow bed, both kept at the same water level so that the pump can run at it's most efficient.

To this end, I put a powerhead in a 90mm pvc pipe to see what kind of flow I can expect.

It definitely looks like being viable.

With only the tiniest head, the thing moved a lot of water. With a head of more than 2 cm, almost no water flowed at all, but I'm hoping to make a zero head system so it should work fine.

It's difficult to see the flow because I cant raise the pipe very much at all without stopping the flow altogether, but there is quite a bit of water fowing over the edge.

I would guess around 2000L an hour.

The flow at zero head with the pipe submerged is a lot more than this picture with a little head to overcome.






120 Things in 20 years, Aquaponics - Powerhead zero head test. I have an ear ache.