what type of magnifying glass do I need?

please help, about to go to the shops and get one

if you're talking about measuring the development of trichomes to estimate the peak moment to harvest your crop, what you're going to be most satisfied with is a 30X scope... They are about $10-$15 and worth it if you want to be 100% sure.

http://www.4hydroponics.com/grow_room/microMax.asp

for trichromes get that one its 60x-100x pocket microscope with an led light, like 16 bucks ^

perfect, thanks

if you have a Radio Shack store near by: http://www.radioshack.com/product/index.jsp?productId=2179604