I'm currently using cocount coir that I purchased from Petco but since I am building a large indoor enclosure for my hatchling sully and I need ALOT more substrate, I wasn't sure if it was safe to purchase the substrates from home depot/lowes. I am planning on using a mixture of both coconut coir and cypress mulch (both sold at my local home depot), but I am not sure if the ones they sell are treated with stuff that might be harmful to my sully. Any insight to this would be helpful. Otherwise, I don't mind just getting the stuff at the petstore even though its much more expensive.