Ok so he finally got off of it & then I cleaned his tank.
I have to say this thing is so light weight & it feels smooth to the touch to me even though it doesn't look smooth. I think it's made of plastic, I should've kept the box so I could read what it is made of.
I have to say I am not afraid of this thing scraping him because it feels smoother to the touch to me than his former stack of smooth rocks felt.
Will the mud turtle like it? I don't know...
-----
PHRatz