Red eyed tree frogs died pls help

[calebrez]

I was the owner of 3 red eyed tree frogs, 2 males and a female
I know for a fact the 2 males were captive bred but I wasn't sure about the female as I bought her from petsmart.
I would like to know what I can do to avoid their death next time.
they were housed in a 12" x 12" x 18" exoterra tank, with coco husk substrate and an all water bottom with a foam backround that was handmade and various plants.
I would leave the mister(reptifogger) on for about 6 hours from 8in the morning to 3 in the afternoon and would put a bit in at night as well.
they had a uv bulb and also a bulb to provide for the plants.
on the bottom of the tank there was a very large piece of wood nestled in the rocks under the water so that if the frogs were to fall off thay could get back up.
there were plenty of palnts which were some bromiliads some types of vinery and also some neroregilias as well some bamboo.
I would often be cleaning the water because the crickets legs and bodies would get caught in the filter.
this may have stressed them out if anyone can help I would be greatful.
the crickets were also fed and powdered.
I'm not sure how often they ate cause I never saw them do it.
any help is great.

I am sorry for your loss No one seemed to mention that a 12x12x18 tank is to small for 3 adult red eyes. a minimum 18x18x24 would be the smallest i go. Also unless you are wanting to induce breeding leaving the fogger on for that long is to much humidity if the tank is sealed. How is your ventilation and temperatures? Also red eyes have to have clean water which is why alot of people use a water dish for ease of water changes unless you have a cannister filter that can cycle the water quickly. But i think the main issue that was talked about was not quarantining the female you bought. But they great thing is that you learned from this and will be a better frogger in the future