Retics are relativly small (30" or more from tip of disc to tip of tail), however I agree with what everyone else says about having what seems like too much tank for even one.
I'm pretty good at keeping my water clean, so I tried a retic in a 120. I put tons of work into water changes and monitoring..... needless to say my ray died and I never even saw what happened. IMO you do need lots of water to keep fluctuations minimal.
You could try your 130, I think the footprint is big enough, but you would have to do something crazy like have a 100g sump with the tank. That would put you up to 230g and might be 'easy' to keep up.....