Removing the Rim? Is it safe...

[blacknife]

I pulled the rim's off my 40b and 33 with no problem and no bowing, but I am no expert. I also cracked a 15g while removing the the rim because a small part of the silicone would not release. edjes were not finished like some other tanks but not rough enough to bother sanding. I guess it depends on the manufacturer. I also still have the rim's for both tanks kicking around incase they are needed at some later point.

+1 to checking for bowing before doing anything with it. If you are making a wave in it perhaps do the FW test and get your wave going and see how it does.