| Re: New 55g setup almost complete... concrete is fine but it does need to 'cure' before becomming inert, i once saw an article that could clear this matter up, if i can find it i will post it here. whatever you make, epoxy resin (not polyester resin) is inert once cured and could seal just about anything you care to construct, I once shaped a tree root out of polystryene foam, textured it with domestic filler, airbrushed it with acrylic paint and then sealed it with epoxy resin...I never used it because it looked terrible lol! but the epoxy coating would have sealed it all up. |