fish tank bug

There are some tiny bugs hanging out on my floating plants - mostly my red root floaters. When I move the plants, the jump off onto the surface of the water then jump back. They've been there probably a month. I had hoped they would go away, but they are multiplying. My pearl gourami do not...

I found this bug in my tank, is it harmful what is it exactly    https://skydrive.live.com/redir?resid=24657CA7048734C3!116&authkey=!AChylEYhbCSZSWs