I'm building a plywood hob
refugim and was wandering what that coating is people use in there plywood aquariums. The one I'm thinking of is light blue in color and had an anse (i think) food grade rating. I remember seeing it in a thread in here stating what it was but I can not find it. If I remember correctly I belive it is mainly used for potable water tanks or water tanks at treatment plants or something like that. it looks like the coating at like sea-worlds big tanks. Thanks yall.