Question
Hey Jacob,  which one is the one to get. I know the middle number needs to be low. I seen one that is all calcium.  I think is was 10-0-0. What would you suggest?
Thanks
Jason

Answer
Don't rely on the three numbers alone.  You need to take into account the actual ingredients.  Here's the one I recommend.  If you can't find it locally, try to find something similar.  Look at the ingredients for mineral content, specifically calcium and magnesium.
http://www.easternleaf.com/Grow_More_Indoor_Outdoor_Plant_food_p/107070-01.htm

Good growing!
Jacob Farin