Thanks for keeping us updated! mind me asking how big the stones are? And just how far the rays actually move them? I would be pretty interested to know how big the stones would have to be to make sure no ray ever moves them!
I can imagine them banging at night would be annoying!
Two days ago I added a lot of stones about 1-2" in diameter, and so far so good. The rays haven't moved them (luckily, if they do, the tank is downstairs and nobody can hear it). I will post some pics.
