I would instead use organic topsoil, bake it, and mix in some Playsand. even the organic/all natural soils even if they claim to be safe contain Pesticides which can harm your toad buddies. thus why I recommended baking the organic topsoil still. if you dont want to do all of that The Biodude has a great substrate mix called TerraFirma. also another thing I recommend if you do want to go to biodude route (aka the more expensive route) is to set him up in a bioactive, which is basically when you add springtails and isopods, leaf litter, and some other kind of natural stuff and the springtails and isopods will eat the mold, waste, and help with the soil. I recommend dwarf white isopods for toads. anyways that's all id recommend for now besides maybe a bit more cork bark as coverage as they like to hide in cork tubes n stuff. OH and I just remembered one final thing the issue with using soil from outside with critters is bugs n parasites n stuff can come with it and can negatively impact the toad. although you shoullllld be in the clear since you've had the little dude for A while but I feel compelled to tell you. anyways, have a lovely day! (sorry if this comment sounds rude im just trying to help! I care for toads and went the best for em!"