The working pressure is usually somewhere around 10-30 PSI
65 would be way higher than normal. Don't you have a pressurize CO2 system? One gauge shows the tank pressure (~800 when full) and the working pressure (there should be a screw in the front of the regulator that is used to adjust it)
I don't think PSI is really the issue when it comes to tubing being "CO2-resistant." I might be wrong on this, but I think it has to do with the material it is made of, because CO2 can actually eat away at some materials, while hardening other ones.
^ I've used that exact tubing before for air pumps and sponge filters. I liked it because it was a bit more rigid than standard LFS tubing, and it was black so easier to conceal against a black background. It's good tubing! Just probably not the best choice for CO2.