Actually, rock piling is quite hard. After all you will want the tank to look natural, the piles to remain firmly as they are, and the whole to functionBirger wrote:I think Haavard attaches many by mechanical means(screws & glues)Wow, is this rock piling ever difficult! Haarvard Stoere has magic hands I think.
I should be done next year...
Just remember you may have to tear it down occasionally for various reasons and if just stacking be certain they can not tip either from getting knocked by you or a fish or from fish digging sand out from under a stone.
Good luck and have fun with it.
I'm piling rocks in tanks (never fixating anything, gravity will have to do the job) now for some 20 years, and I'm still improving