I used Pratt & Lambert epoxy paint for the waterproof coating on all the inside plywood walls. The grain lifted slightly on the plywood I used and over time the epoxy coating cracked and oozed. I've not researched it, but were I to do this again, I'd want a plywood that doesn't lift the grain. Maybe luan, hardwood ply like poplar or even marine grade. I did use hardwood ply on an ATO reservoir that I built using the same epoxy paint - and I'm still using that, 23 years later.
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Simon
Got back into the hobby ..... planned to keep it simple ..... yeah, right ..... clearly I need a new plan! Pet peeve: anemones host clowns; clowns do not host anemones!
Current Tank Info: 450 Reef; 120 refugium; 60 Frag Tank, 30 Introduction tank; multiple QTs
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