I'm not sure if there is a still a template kicking around somewhere that you can use. (... Titus?)
What you can do (if this is not the correct thing to do, I'm sure someone can jump in here and give you better advice, but since I'm first to answer, I'll tell you what I'd do, for better or for worse...) is copy someone else's tank specs, and then paste into a new post, editing out for your setup.
I don't know if that retains the formatting, though.
Not a very elegant solution mind you. Sorry I couldn't be a better help ...
ops:
(PS. Moved to Q&A...)