Removing all table borders

Hello Again! So the design I'm doing relies a lot on tables and there seems to be some sort of default border put on all tables across the template. When I try to remove them in-line the only parts removed are the top and left sides of the border. I tried adjusting the common table tag and various other css tags but it didn't work. What piece of code do I need to disable all borders on the tables within my pages? Thanks! E