it may get stuck in the out way (umm yeah i hope you get what i mean) because of the smaller particles. but other than that it probably will be fine as long as its clean. may also release old trapped detrius/phosphate/nitrates, etc.
I thought it might release phosphates but that is why I posted this question... Maybe if I bleach it then let it dry out it might kill the phosphates...What do you think???
Wash it really well with water change water and use it in your reactor - I don't think it's as good a substitute as other media types (dead porites colonies or ARM) but for sure it'll work