maybe you can safe your plants by putting them in closed pots (those usually used for decoration, without holes in the bottom. otherwise, too much water will leak into the substrate.
also, be careful with dehumidifiers - as far as i know, most of them work with chemicals and are quite toxic! tarantulas don't do well with toxic substances near them, they're relatively easy to poison.
two words about the substrate: DO IT. an adult ephebopus murinus female died on me after a fall from a smaller height! and those are lighter bodies than smithis, so you run an unneccessary risk.
sometimes she will climb, even if humidity is perfect, and a grave injury usually means death. if she injures herself and you're not there, she will simply leak out and die - ts do not have clotting agents and just bleed drie from injuries that might not seem too bad at first. it's just not worth the risk.
also, be careful with dehumidifiers - as far as i know, most of them work with chemicals and are quite toxic! tarantulas don't do well with toxic substances near them, they're relatively easy to poison.
two words about the substrate: DO IT. an adult ephebopus murinus female died on me after a fall from a smaller height! and those are lighter bodies than smithis, so you run an unneccessary risk.
sometimes she will climb, even if humidity is perfect, and a grave injury usually means death. if she injures herself and you're not there, she will simply leak out and die - ts do not have clotting agents and just bleed drie from injuries that might not seem too bad at first. it's just not worth the risk.