Backyard Aquaponics
A place to discuss aquaponics

Here is some extra reading for you Milne. http://www.biofilters.com/webreview.htm

The commercial tanks I got to make a swirl filter were stuffed with trawler fish netting, see photo.

Kaldness appears to be the best, but at a price. They have a new product out now that I read about from the Koi Fish site its called "Bio-Chip" and is supposed to be a lot better than K1 or K3.
Has anyone got experience with this?

Not quite chainsaw - the biochip is designed to be used in conjunction with the K1/K3.

Yep, using it in a moving bed filter for most of this year so far.

I have an extremely exciting video of it working (the bio chips are the black bits), here;
http://s971.photobucket.com/albums/ae193/mrchillidude/

So, a moving bed filter is submerged in the fish tank or sump with air stone in the bottom for the movement and aeration ????

That's how that one works, yeah.

Been googling moving bed biofilters and there are some cool setups out there. I am thinking of a small one for my 500L system that only has 450L of growbeds. The ammonia shows readings of 0.5 at times when the fish got bigger. Got 25L/min air going into the tank so using one of the air lines in one of these would be good me thinks.

I remember seeing once somebody who had a koi pond and he had filters built out of 2 ibc?s

Some folk really love their Koi eh.

Dufflight has been running an ABF (airlift bio filter)... for ages...

These moving bed filters i still cant get my head around how they work

That pic/movie is not showing for me

Yep - Duff's was the original inspiration for me to put one together !