I've been trying to think of a way to rid my tank of "buggers" for a while now. I have an idea but it is probably completely nuts. Oh well, here it is.
First, take everything out of your tank that you don't want to die.
Then, find a way to run an electric current through the water in your tank,

I was thinking about using a car battery, jumper cables, and a couple of spatulas. Metal ones.
Just had another idea.

This might be more effective, and safer.
Find a way to heat the water in the tank to 150 degrees or so. That would kill everything.

This shouldn't break the glass as long as it is a gradual increase in temerature. Don't just dump boiling water in.
If you are crazy enough to try either of these you might want to take anything electrical out as well. (i.e. filter, heater, etc.)
Let me know what you guys think. And if it works. Again, I must stress I have not tried either of these ideas.