Hex tank
Yes, you are right hex's are a pain in the behind! It took forever to get the rock stable as there is no floor room and stacking up a rock tower is very hard! I did finally use glue on everything, as I lost a couple small frags under the rocks, and decided they weren't worth taking the rocks apart to find after the headache of getting them stable!
Amazing last weekend I needed to replace a power head, so i was doing a little moving around, and I moved a large torch coral and found my two branched frog spawn frag head down under the rocks. Must have been there for a good two months, it was of course all closed up, figured it was dead. I moved it straight to my daughters 26 gallon tank and in two days it was wide open and is doing better than ever! Frog spawn must be incredibly hardy!
Anyway, once you get everything glued down, it's much better, and much more stable!
Colleen