Backyard Aquaponics
A place to discuss aquaponics

One of the best media for moving beds (and one of the cheapest) is virgin HDPE beads approx .96sg. the only problem with them is their size approx 3-4mm so the outlet to the filter has to be able to stop them getting anywhere else. providing the bed is moving slowly they also provide mechanical filtration.
I keep looking at polygeyser filters and trying to work out how to build one; but at the moment that is just a dream.

I am not familiar with a bubble puck. It would probably/maybe do. In my aquaculture operation I use ceramic airstones that I get out of the states for a few dollars a piece ($2-4/each) but then again with the company I deal with if I spend $50 dollars or more I get free shipping to Canada. You could use brushes and spin them. Up to you and your imagination. Me personally I use the KISS principal but if you want to make an engineering masterpiece all the power to you

hmmm, what was that company that ships free to Canada? the last place that quoted me wanted 100$ shipping for 100$ media

also how many air stones? do you have them arranged 1 per tank, ie 1 with fish, 1 with biomedia?

I will give brushes a try, in round 2, even thou I'm not really an engineer

The company is called Pentair Aquatic Eco-Systems. It is probably one of the largest aquaculture and aquaponic distributors in the world.

For my trout hatchery, I run one air stone in fish tank and one air stone in my biofilter.

k, thanks again guys!

ended up getting the k1!