Need rainbow help quick

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Hey all, so I am basically new to snakes and got a rainbow this sunday.

I need cheap ideas to increase humidity in the cage. Im working on a cover that isnt mesh (and the plan is to get a plastic vision type cage for the long haul) but I am worried about how low it is (mid 60s).

Im using cypress mulch for substrate and moss for hides until I can get better hides (will keep moss in it), and the cypress is moist but not quite mud.


I was thinking of one of those ultrasonic humidifiers in the tank, but wasnt sure if it would be ok with the snake or not. something like a USB mushroom i saw or those early 2000s lamps that "smoked"


also, can anyone point me at a good plastic cage for Floyd, big enough to hold him when hes grown? Id like to buy the one and be done with cage shopping