Backyard Aquaponics
A place to discuss aquaponics

The two pumps I have for circulation both came with venturi fittings ( maybe theyre not actually venturis , but they have the same effect ) with a thin air hose that sucks the air in as the water flows out the front of the pump . They both push alot of air but theyre too noisy for my tastes , so here's a little trick I learned yesterday for making them whisper quiet without losing any air intake :

get an old plastic film canister ( or something of a similar size ) and drill two holes in the lid

jam a tube joiner in each hole and attach the air hose from the pump to one

keep the whole thing out of the water obviously

Viola - now your pump is shooting bubbles out like mad and not keeping you awake at night !

They were that loud?? Whats the pump capacity?

Nice Drawing too

The "giggle" noise from Venturis is really loud. Thanks Boris, this solution helped me.

What you have done is created a muffler just like the one on you car.
You could add something like cotton wool inside the canister to create a filter as well that way no dust or bugs will be sucked into your air hose.