Steven,
Have a look at the threads on this forum, 44, 47, 87, 108.
This should give you all you need to know on how to make a TT.
It is as easy as it looks... or easier.
Basic design is water butt or similar vessel larger the better.
Dont use the tap but cut a hole in the bottom with suggest a 2inch tank connecter in it. Pipe this back to the pond (obviously this has to above pond water level to gravitate back).
Then the feed is pumped from the last filter bay up and over the top with a way of sprinkling the water over the media. You are trying to achieve something that looks like a shower head effect.
If you look at Alans design he has used a bucket with holes drilled in it and a basket, I have used a rotating arm.
The media is ideally Flocor or like you say pipe cut up into inch lengths. corrugated pipe would be better so that the bacteria have a large surface area to live.
Hope this helps
Posted on Jun 27, 2006, 1:24 PM from IP address 213.120.71.165