as you can see in my pic i went with a nutural look as if it were in a creek or something and my rocks arent even close to smooth. my turtles escpecially the snapper are always hiding under the ledges and in between 2 rocks. they are really tough these guys and as longas your not keeping it on a beltsander i dont think you have to worry about it hurting the shell(unless they are young and have not gained the shell hardness yet)

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0.1.0 normal corn het hypo,anery
1.0.0 snow corn het hypo,anery,amel
1.0.0 amel corn unknown hets(4ft 8inch long)
1.0 sinacorn
0.0.2 snapping turtles
0.0.1 3 lined mud turtle
1.1 kenyan sand boas
coming soon
0.1 mbk
0.1 albino nelsons