We are going to convert a small pond liner with a spill over into a biological filter. I have seen so many different suggestions for media. What is the favored media if you have a bio filter?
Thanks!
Biological Filter Media
Well I did tons of reseach and then went to the Dollar General and bought many packs of those plastic kitchen scrubby things . A 3 pack was $1. I put a bunch of these into a net bag and it has been a cheaper suggestion that did work.
charlotte
And I used the air-conditioning filters that you cut yourself to make the proper size (they don't have the paper frame around them) Under that I have a layer of the sheet kind of quilting fiber-fill.
I've heard lava rock because the beneficial critters can grow all over the porous insides of the rock -- lots of surface area. Haven't tried it.
From what I understand, Bio balls can't be beat. Easy to clean, light weight, and plenty of surface area.
-Duke
Our bio-falls system that we purchased had a frame work that supported two layers of the course filter, then on top of that we had 30 lbs of lava rock.
Well we decided to set up another pond on a temporary basis and made one that worked very well. We took a rubbermaid type tub and fitted it with a bulkhead fitting and hose from the pump. Then built a pvc frame with legs and placed in the bottom. Then we added two layers of the course filter material and then lava rock to just below the top edge. We put the lid back on after cutting a flap along the long side for the waterfall. Cheap workable solution. The bulkhead fitting is the most expensive item.
We still opted for a small skimmer since it was under trees.
The picture was prior to the lava rock purchase.
