Well, we have no experience w/ TBs, but the profile here says something like 68-79*F. From other research and info from ye olde LFS, everyone else pretty much agrees w/in a couple degrees. But then again, there's always going to be a little deviation between opinions. Our guess, go with the profile here and you can always double check w/ your LFS people, if you trust them. That's usually how we operate and we have had no problems, now that we've found a LFS w/ an operator who knows what he is talking about and didn't just get into the biz for the $$$$.