Simply Koi and More Koi

Aren't the tunze ones marine and not freshwater? Anyhow yes Graham they extract DOC (Dissolved Organic Compounds) from the water. This is done by frantically aerating it via venturi or an airpump, passing this mixture through a column or doughut of water and letting the resulting foam that builds up...

Are you sure those food buckets are big enough? I ended up have to use full size dustbins (B&Q, 9.99). It was the only thing big enough so I didn't have to clean it every 2 days...

Tony.

[img]http://i49.photobucket.com/albums/f269/Rhod ... imvort.jpg[/img]