Large tanks like that are usually made out of GLASS.I doubt if even 3/8 thick lexan can withstand the pressure that 100 gallons of water will be putting on it.Even the 5/8" glass, my 130 bows out at the middle about 1'4".That is why acrylic tanks are made with NO seams.That much pressure,plus the added flexability of acrylic(lexan)will surly pop at the seams...I doubt if there is a glue anywhere that would work...