Microarachnids?

[metalop1g]

Every now and then, when I water my phal, 1 or two miniature insects crawl out of the media.. they are a bit hard to see if you are not looking for them. They are white and round, tinier than a pinpoint. I also sometimes see one of em speeding inside the clear pot hosting my orchid. They ae very fast creatures and look like arachnids. I'm pretty sure they have more than 6 legs. Unfortunately, I can't take a picture, since they are so small and I don't have a camera.

Any chance they are sucking on it's roots?
Should I repot?
How can I get a rid of them?
and what are THEY?

Thank you and please help me, I can't stand these horrible parasites anymore