DYI Tree Stump removal, how best to do it in the city?

Question

What are the best ways to remove old tree stumps in the city by yourself ?

Answer 1

(KNO3) potassium nitrate drill some holes in it and fill with KNO3 and give a lite water repeat for about 5 to 6 weeks and it should be very poreress and you will be able to break it up with a sledge hammer

Answer 2

What I have done is dig around the stump, cutting through the roots, and eventually it gets loose to where you can cut off the last few remaining roots and pull the stump out.  A lot of work, but you can do it with a minimal amount of tools, no chemicals, and a big plus, you get lots of exercise.

Answer 3

You can buy a solution that will kill stumps & their roots (if they still sprouting).  You drill some small holes & pour the stuff in.  

Tree services have machines that eat out the stump to just under ground level  (but you pay for it).