I have a Tenecor 120g, 48x24x24 since mid 1990s, that has been filled and emptied multiple times, and has the bigger top cut outs…built with 1/4” acrylic… no bowing!1/4” is insane.
I don’t own tenecor but i would advise you do some research. Even 24” at 3/8 will bow. 1/4” acrylic for any size is crazy to me. My 25” is 3/4”
My 200g and 500g (6’x5’) are 1/2” with no bowing
3/4” is not necessary for most hobbyists tanks.