I've been considering making some stuff out of "aragocrete" from GARF
http://www.garf.org
I know they're plans are to use it for live rock...but what the heck, I think some modifications to the formula could make for some good freshwater caves, rocks, etc.
http://www.garf.org
I know they're plans are to use it for live rock...but what the heck, I think some modifications to the formula could make for some good freshwater caves, rocks, etc.