I have a regular 60 Watt bulb over the tank on a timer, 12 hours on 12 hours off. The temp during the day is about 78-81 degrees, 65-70ish at night. Humidity is at anywhere between 60 and 80% depending on when I mist.
I've gradually increased the water area everytime I clean the tank, started out with a large bowl and now the tank is 80-90% water since my guys and gals like to swim and do laps etc, only going out on land when there are crickets present. Aquarium rocks make up the bottom of the water area, with large ones on top of those where they break the surface to prevent impaction from feeding. There is also an aquarium plant in there as well as a tree stump with leaves and an underwater cave that one of my guys likes to hide in.
They need a cool down period followed by a warming to induce the mating conditions found naturally (NOT to say they won't under "normal" conditions). Let the tank cool down to the low to mid 60s for a month or so and then gradually warm it back up to the usualy of 70-80. Vary the diet too, not just crickets. These are just suggestions to provide the best conditions and possibilities of mating, but it's not a guarantee.
As far as color goes they change colors at will, there isn't neccessarilly any rhyme or reason to it.
Yes I have never tried but I have never prevented it either. I was merely stating that just because they're in amplexus doesnt mean you should expect eggs. Also, it could be male on male as sometimes they get confused and jump on another guy.
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