What do you mean? The water section is just a bathing pool, no waterfall or anything fancy. Just a place for them to get wet. The tank is very low-tech, nothing electrical attached to it except the NatGeo hygrometer/thermometer.

I was thinking of pre-mixing gallon jugs of RO water with stuff to remineralize it. I usually have several 5 gallon jugs of the stuff around for my fish tanks, so it's very convenient to simply use it for my toads. Then I'd have water ready on draining day and could simply refill what I took out. Planning to use a turkey baster for water changes, if you can even call them that lol.

Of course it suddenly decided to get super, super humid where I live, so the tank has been sitting at 80+ humidity for a week and a half. I need to break it down and remove the substrate that fell into the drainage layer somehow, I think that's the cause, as the humidity in my apartment has been around 60% during this time.