I've read several times not to use any sand as substrate for my sulcata hatchlings, but now I'm reading that I should use like 50/50 soil to sand ratio combo as a substrate for them. Can anyone weigh in on this please. I have 2 Sulcatas. 1 is about 3inches and the other is only about 2.5 inches. I want the best substrate possible for them. Please give me your advice folks. Am I gonna have impacting problems if I use sand like this? Should I use any cypress mulch? Or does that run the risk of being too moist?