Not aesthetically, but from a water chemistry standpoint. I have a bunch of deer antlers and had the crazy idea of placing a small piece in my tank and "seeding" it with zoas or GSP and eventually having an odd acropora looking thing. Does anyone know if antlers would end up doing bad stuff to the water over time? Has anyone actually tried? I can't imagine that they're inert, but if they'll last for years as opposed to months or weeks, and not do any damage along the way I might give it a go.