Narrowed my choices down to 2. What's your opinion??

[BCOrchidGuy]

Wow, I tried to source out 1/2 inch glass but it would have cost me more to get the glass to build a tank than to buy the same size. Where do you get your glass....

Doug

[Scavenger]

I'm only going use the glass on 3 sides. Bottoms and backs are usually plywood.
Properly treated, it lasts forever. I built a few boats before tanks and just incorporate the same waterproofing and treatment in the tanks. Some sealers have to be changed for toxinicity, but 2 part epoxy paint works great and can last for 20 years if your careful. I'll tell you one thing, this makes drilling and plumbing a breeze!!

[BCOrchidGuy]

Oh I gave some thought to a plywood tank as well... I think if I was going to build a really big tank I'd seriously look into it, but for the size of tank I've got, glass is probably cheaper when you consider the time investment etc.

Doug