OK I know many people here are familiar with cloud chambers particularly those of you who are teaching. I have never built one but I want to go all out on my first attempt. I have seen plenty of instructions from researching through google and I was wondering if you guys have any additional tips from past experience? I am thinking of using a 10 gallon fish tank. Is there any way to make it so I don't have to keep adding alcohol? I am going to use some really bright LEDs and I am gonna have dials for red green and blue intensity as well as strobe frequency. I would rather have them on top but where is the best place to put these? I also want to make this a plug in cloud chamber so I want to make it without any dry ice. Is there a certain temperature I have to get down to? Will thermal diodes get me there? Any ideas?