Hi Steph, you probably won't remember me, but I bought some tan/orange rics from you a couple/few years ago. Still have them, though I've had to nurse them back to health after some tank issues. Still not back to how you had them and still trying to figure out what in the world you did to make them grow so well. Under my care, they slowly receded.
Anyway, I was going to start my rock wall this weekend. I'm guessing yours is done now except for the epoxy you posted about in your other thread? How did it turn out? Any pointers? Pictures? I think your overflow is in the middle, which is similar to what I have to deal with on a 90g RR.
From talking with Chad at Gateway, I know you need to remove as much of the foam as possible, otherwise the thing will float. Also, he makes his out of live rock, but I believe keeps it all fairly wet and works very quickly to keep from killing off the rock. Not sure how that affects the foam/rock adhesion.
How are you going to attach it to the wall? I've been trying to figure out how to make the wall so that I don't have to glue it at all (thinking of an 'L' shape in section so it is free standing) or use a glue that can later be removed.
FWIW, I've tried silicone + sand before and found that does not work very well. It probably depends more on what kind of surface you are adding silicone to, but the problem I've run into is that if the silicone peels, it all comes off.
Mark