in my tank i used sand and I LOVE IT and poop simply settles on the top of it and is easy to vacuum off gravel it works its way down and is much harder to clean
Sand imo. It is more difficult in the begnning but one you get use to it sand can be a lot faster to clean. Just have to find the right heigth above the same to suck up cr@p and not the sand itself.
If I were going to set another tank and based in my current expirience I would go with any of the next 2:
1.- Sand because is easy to clean. Sand keeps the dirt over it and makes you easy to syphon the waste out.
2.- I'd go bare bottom: It Makes your life simply and easy. Waste is eliminated more eficiently and I have seen some P's bare bottom setups that are really amazing, just decor with some bogwood and that's it.
I just got some black Estes Spectrestone.....looks uber in the bag, Hope it looks as good in the tank. gonna mix it in with the natural riverstone thats in there now to darken it up.