Reposting the same questions with additional information

https://www.youtube.com/watch?v=2TXHpQ_5HWQ

Water collected from bottom of overhead tank.
Magnification is at 400X.
Looks like a ciliate to me as the movement is too fast for a flagellate.

see http://www.askabiologist.org.uk/answers … p?id=13766

I agree with you they are likely to be cilia.

Looking on-line the directional movement is more consistent with a ciliate as well!