I'm starting my habitat shopping for my Sulcata(Grumpy) and my pancakes(Bonnie & Clyde) and was just looking for some input on the proper substrates for them. I seem to be hearing a lot of people using a topsoil/ecoearth(coconut coir) mixture. Is this suitable for both desert tortoise? Or should I use more rock than anything else for the pancakes. I know not to use the sand. I know I'm probably driving you all nuits with all the questions, but the knowledge I've gained in these few days has been priceless!!!