last year I considered building a plywood tank, and checked pricing here and there for the resin.
I found US composite was by far the cheapest, se below, there price point, with shipping to Victoria and made in the us, so no duty, only the local tax:
1x EPOX-635416 = 10 Gallon kit $490.00
1x set of EPX-P41 $6.75
16 yards of FG-C0738 fiberglass cloth $76.00 = $572.75 + $169.98 shipping = $742.73 total
here is what I put on reefcentral
http://www.reefcentral.com/forums/sh....php?t=2064052
even der wille zur macht used it for reef application