I dunno. I think you have more possibilities if you can reinforce it. Plus, stuff just happens that you can't plan for. Like right now in my 115g, I have a 4-5lb rock on top with a clam glued to it that is constantly being jostled. I have no idea who's responsible for shifting it around like that, but every few days I'll find it in a slightly different orientation.
Seen a couple tanks that mortared the rock structures and I thought they looked good. But .. well, we'll see, I don't have much of a knack for aesthetic rock placement so maybe it will just look like butt in the end anyhow.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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