| I am using a two part epoxy from home depot I can't remember who makes it I think its by west smith or something like that. I am using it on all the exposed foam and then cover it with agronite so you can't see the foam. I was thinking about doing the samething with the crushed coral but did not have any on hand, the foam is really sticky and messy but I don't know if the crushed coral would hold in without epoxy | 
