I have recently acquired 3 red-eyed tree frogs and it's he first time I've owned frogs. They live in an 18"x18"x24" glass terrarium with the grilled top (is this big enough for them? I was told that it should be by petstore people, but they're not always the most experienced people..). The humidity and temperature seem top be stable. I got the first frog about a week and a half ago, and got the the others a few days later, as I was told that they are happier in groups. When I first had the lone frog I made a mistake... I used tap water to mist and also put it in the water bowl. The frog seemed to be doing well, it woke up at night and I saw it eat crickets. When I introduced the new ones it was still active along with the others at night. During the day they would all bunch together to sleep. This was all going well for a few days, and then I noticed that the first frog hadn't been moving from its sleeping spot. I tried observing them at night and the other two are active, but I didn't see the first one move at all. I can see that it's still breathing when it's sleeping though. Also, the other frogs haven't gone to sleep with it in their regular spots for two nights now (which was under some leaves and they would all be close together), and they now opt to sleep at the other side of the terrarium on the glass out in the open.. Should I be worried? Could the tap water I used at the beginning have affected my frog??
Also, for the water.. I have an automatic mister which uses distilled water, so that shouldn't be a problem anymore. For the water bowl, can I use water that went through a Brita filter, or could water which was left out 24hrs to get the chlorine work also?