Oooh! That makes total sense, I never saw that on Amazon or eBay, I always thought it came in two pieces, on loop and one hook, I never saw the kind that are back to back. AND I knew you are too smart to not be describing something correctly so that's why I questioned it so much.
I will do as much as I can with the 50 yards of one sided loop I ordered by wrapping the tanks with the loop and using a smallish piece of hook (I have lots of that too!) to connect them, and if I need more I will order the double sided kind. I have 13 vivs currently inhabited and have on STRICT orders that NO MORE will be needed, but I think he forgot about the other empty 20L and 55 gallons in one of the spare bedrooms! And that Repticon is this weekend!
Thanks to you both, that was driving me crazy!
Thanks for your patience, and keeping me sane.