http://www.tapplastics.com/ They have stores all over the west coast. They have good videos too, on cutting, welding, and heat bending acrylic. Their stores have all sorts of pamphlets on things to do with acrylic, I picked up one called "Working With Acrylite" which has been really helpful.
Ok, now messing with 1/4 inch acrylic. Much easier to work with than 1/8th. Doesn't catch on fire near as easily.
Have the table saw up and running with a 200 tooth cheap ass blade made for plastics. After seeing it in action I'm probably going to upgrade before I do these tanks for real.
Here are some photos of my rough cut 1/4 inch scrap. The tank will be 11.5" long X 8.5" tall by 7.5" deep. 3 whole gallons! The largest I could do with my available scrap. Sides are 1/4", bottom is 1/8".
Rough cut 1/4"
Quite crappy.
After hand filing the edge and flame polishing it.
I'll put up some photos of the "tank" when I have it mostly together. Honestly a hundred fold increase in quality from my first attempt.
Sorry, it focused on the back of the tank. I'm wondering if I'm getting so much crackling because of the flame polished edges? I might use this for a photography tank.