[SoFloReefer]

I am building one out of wood and epoxy now (frag tank). You can check it out in Coral Prop forum under 4' x 4' tank. Anyways if you are using metal halides you should take into account what UV radiation will do to the epoxy. Epoxy is UV sensitive and will break down with time. This could be an issue in several years time or less. Pigment helps as it lessens light penetration into the layers. I am still trying to figure out how to protect my tank. You might want to look into using graphite powder as a filler if you are going to dye the epoxy black. This adds some UV protection and abrasion resistance. Anyways I think you will probably need in the range of 4-5 gallons for a thick coat. I was originally going to use MAS but many of the new low viscosity slow curing epoxies dont have Amine blush. The stuff Im using cost 50 something for 1.5 gallons and didnt blush. I still sanded each layer though for better adhesion between the layers.