How to make Reef Plugs for Frags

[Bearfan]

Anyone have any experience making reef plugs for frags? If so, how do you go about it and what do you use?

 

[obedey]

GARF has a page about it but id think that would be the first place you looked, anyway http://www.garf.org/news4p2.html#plug they use 5 parts Carib SeaTM aragonite sand with 1 part portland cement.