So I'm looking to finally build my indoor pond out of wood and I'm wanting to do viewing panels preferably otherwise atleast one big. The pond itself will be 8ftx6ftx 5ft deep roughly 1500ish gallons. I was thinking atleast 60in long x 3ft wide panel in the front and then 2 smaller on each end. My question is how thick of a sheet of glass am I looking at for the main viewing panel the side panels I'll ge the same thickness just cut smaller to keep things simple and safe lol. A few people have told me about 4inchs but that seems pretty extreme to me