One of my juvenile tomato frogs stopped eating. Nothing has really changed. I have 2 1.5 inch juvenile tomato frogs in a 10-gallon aquarium, housed on coco-earth, depth about 1 1/2 inches. They eat small crickets and have readily eaten all they can catch until a few days ago. One is still eating well. The other one just stays mostly buried in the coconut fiber and shows no interest in the crickets. I've had these two for 3 months and they were about 3/4" when I first got them. They've always eaten everything I've given them and have been eager eaters.

Substrate is changed about every 10 - 14 days, spot cleaning daily. They have a water bowl they generally do not use -- it is emptied and refilled daily with dechlorinated water. There are also fake plants as well as a half-log and a cork hide to hide under.

Humidity is around 80%, temp around 80 daytime, falls to around 75 - 78 at night.

The one not eating doesn't seem to be getting thin, but I don't know what could be causing this. Any ideas / advice on this would be appreciated.