OK, I realize this is a true newbie question, but I'm just starting to collect zoas. I have a bunch of frags mounted to little square pieces of ceramic. Right now they're just all sitting on the sandbed of my 12 gal Aquapod. When I try to sit them up higher on some rock, a snail always seems to knock them over (not to mention that it looks kind of cheesy!). So, how do I get these frags to spread over the large rocks in the tank? Actually, any suggestions for turning a bunch of mounted frags into an eventual zoa garden would be really helpful.