Which substrate is best?

[Mrr]

Hey there,

So I'm looking to change substrates for my two ball pythons and young African house snake. Currently they're all in tubs with paper towel, but I'd like to make them a bit less sterile looking.

The number one substrate that's been recommended to me for my ball pythons is Coco coir (Eco Earth brand).. but will this be too humid for my house snake? I'd ideally like to only have to buy one substrate that can be used for all 3.. but I've heard that aspen (which I feel would be ideal for the house snake) is too dry for ball pythons, and cypress/repti bark has the risk of ingestion. I feel like I'm stuck here..

So what do you guys think would be my best bet for all 3? Or is it better to get different substrates for each species?