[mike31154]

Yes, it's a frag tank, West System epoxy is not cheap but it is after all a DIY thread and think of the possibilities & flexibility of a plywood build. You have the freedom to build it any size and shape you wish without too much hassle. Easily drill holes to your heart's content. Epoxy is totally inert once cured and provided you do the work in a properly ventilated space, the fumes while curing are not a problem at all. Many of us use two part epoxy putty for securing frags, so where the idea of toxicity comes from in this thread I don't know.

Although I haven't built a plywood tank, I have built a boat and I'm sure a rectangular vessel to hold some frags would not be that difficult. Fewer panes of breakable material to worry about. You don't have to get too fancy, but if you wish, you could get quite creative with wood, including inlays.