Protozoa in a hydroponics set-up.

[arnoldboer]

Can you tell me what these creepy crawlers are and what to do about them? Details can be found in the attached link.
http://www.arhen.com/?p=291

[Ravnis]

looks pretty close to a tetrahymena

a video of it can be found here (http://www.microbiologybytes.com/video/Tetrahymena.html)

[webhydro]

Wow, never seen anything like it. Please keep us up to date on how to fix :)