Oil Dri needs a cap?
First, sorry to start a new thread about Oil Dri, since most of the searches I did was of thread that are really old. So here goes. I am going to set up a new 50 gallon tank soon, and was thinking of using Oil Dri as a bottom layer and cap it with either some small gravel, or something like PFS. Many threads that I read through, mentioned that stuff like kitty litter can compact over time. Is this true of Oil Dri (which is basically the same stuff) Another thing is that if I cap with PFS, will the PFS settle below the Oil dri? Should i be better off capping with a larger particle stubstrate like river rocks or other small gravel?