From Hero to Zero

Hello

I'd like to make a long story short here.

A few months ago I started a website and using various black hat methods (link building) I made it on page one (top 3 for some keywords). I was getting 1500 hits per day. And making profit. About 1 month ago my sites rankings suddenly dropped. Now I get about 50 hits and I don't think any is from google. I'm not in the first ten pages. But when I type my site in directly to google It comes up.

I don't think there where any updates at that time so I don't think it has to do w an update (although not 100% sure on this).

Right before this happens I did two things.

1. Installed google analytics

2. Redirected this site to another site

after seeing ranking drop I removed redirection and google analytics but rankings are still gone.

Could it have I do w 1/2 or is it penalty?

Also how can I know if it's manual penalty or not?

Thanks