I recently got 2 box turtles. The pet store suggested I use eco earth soil as a substrate. My question is the turtles has the soaking pan full of soil within minutes and they are caked in soil also. They just go from soil to water over and over. I just want to make sure its OK to have them full of soil. I also plan on changing water daily but is it OK to have soil in it. Want to be sure they are safe!!