Is it fine to use only pea gravel to replace the peat I have currently? I've heard that peat is really bad, and I can't seem to find any soil mixes around my area that sells anything that doesn't have peat in it. I want my cacti to live the best and happiest, can someone suggest some good bagged mixes or what kind of soil to use? I want to use a mix recipe, but I only have about three mini cacti and the stores sell pretty large bags of the things needed so I would have a ton of leftovers if I do...

Thank you! :>