Hi, I just received my two red eye tree frogs. When I was looking at one of them, it had a weird white marking on its head/neck. I'm not talking about the normal white freckles you see on their backs. When he was in his cage, he could not climb correctly and kept falling. He was also a dark color most of the time. I know it could have been stress from the shipping process, but I think it got a parasite or fungus. After about 20 minutes when I noticed these weird symptoms, I immediately took him out of the cage and quarantined him from the other frog which looked, and still looks healthy. I watched the frog carefully and it didn't go to sleep for a long time. I went to bed and when I woke up I found out the poor thing didn't make it through the night. Any idea on what it could have been? Heres a picture. You can see the white marking around its head/neck area.

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Now that we know something was wrong with it, should I clean out the whole tank which the other frog is still in? The sick frog was only in there for about 20 minutes, and was in one little area of the tank. Im worried because they were in the same shipping container together as well.

As for the substrate, do I have to replace it now?


Not regarding the health issues, how often should I replace the substrate and clean the cage? Should I clean the cage once a week and replace the substrate once every two weeks?

Edit: I also just thought, should I use a different substrate as the one seen in the picture? I can imagine that the crickets would hide in there and it would be hard for my frog to find them.