thanks slice. that monti gave me hell a few months ago. it started bleaching like crazy and i couldnt, for the life of me, figure out why. so i fragged it down and glued it to a rock. it bleached for a few more days and then started to grow like crazy again in a really cool pattern. i have a purple monti cap frag that started to do the same thing. i think it's because of stuff settling on them so now i blow them off (very occasionally) with a turkey baster.
as far as the rock goes, i have no idea what that is. i've tried figuring out what it is, to no avail. most, if not all, of my rock is spiked like that. it doesnt seem to bother anything with the exception of my hands when i reaquascape.