Ec Meter

I have been given an EC Meter which measures in mS. I am not too sure how many mS I need for my plants nutrients. I use a DWC set up (bubbleponics I think people are calling it) If somebody could lead me in the right direction of mS levels or something much appreciated?
Thanks people

Don't know about MS, But I will bump your thread back up for you.

Here's a link to convert ec to ppm. Hope this helps.

Convert EC / PPM measurements

I think thats exactly what I need. Thanks heaps