I hope you don't think I'm speaking of that edged pebbles..? >.< because if so I do more than agree with you.

I mean the round ones: http://www.aquastein.de/resources/Fl...+schwarz+I.jpg

actually those seem comfy (well, say " comfy ") to me, since they are like palm stones. of course, I wouldn't like to lie on a pile of those, but I wouldn't like to live in a tank sticking to glass either... or do you think frogs don't like them as well? (hope not to sound sarcastic, I really mean it.)