Aany Aquarium people in your area? I had a guy drill my 20L for free. Only really need 1 hole and it can be towards the top. Not sure if the Hex tank would be harder to drill though.
More water volume is nice but sometimes it is just not feasible. Don't have to have a sump.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,