[Tanu]

My website is dead, but the support trick works a little different. I use the rods to make reef piles, he connects the rods to the walls just to 'hang' the rocks on them. This way, it is really easy to build high structures without the need for large ammounts of rock. Apart from that, the structure is stable.

Because you don't need to fight gravity anymore, you can build interesting structures relatively easy.

Abour the sun corals: indeed there are boulders with it. A small importer here in Holland can get these easily on demand...