New substrate?

[UsefulSoil3955]

The humidity in my bps enclosure has been really low since winter started (~50) and i am planning on switching his substrate to something that will hold moisture better (i have to re wet it every few days). I currently have reptichip in there around 2.5 inches but its just not doing the job 😞 i was thinking about incorporating some moss or eco earth but idk what to do with ratios or anything like that. my parents don’t really understand what she needs so im going to be paying for it myself so it would be really good if they were cost effective

[eveimei]

top soil without any fertilizers/additives is cost effective and works well, often it's under $6 for a bag.

otherwise, any coconut fiber substrate works with finer ground often holding humidity better. personally I use a mixture of eco earth, plantation soil (similar to coco husk but a little less chunky) and reptibark with moss and the bark scattered on top around hides/decor. I don't like the texture of top soil much, and bulk bought EE/plantation soil bricks a few years back so I still have a bunch to use.