Thanks for your vote of support Grizz. But even I side with Paddyob when it comes to buying frags as I generally remove them from their plugs at some point. However from an aquaculturist standpoint I find them necessary too because I need a solid surface to mount everything to. Otherwise all of my frags would end up blown into a big heap of dead coral. Conventional plugs are too small and require eggcrate which I detest because of its affinity for nuisance algae. Rubble is too irregularly shaped and inconsistently sized for my liking. All store bought frag mounts in general are pretty expensive considering what I can make my own for. I also find store bought disks to be too smooth... Epoxy will not hold them in place very well.
Coraline and or coral growth eventually covers everything so I don't see much point in dying them. However you could use different colors of sand to make yours distinguishable. Maybe just mix in some black sand or use only black sand? I'm not sure what (if any) colors beyond white and black are available.
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