Uh-oh. This could mean a couple of different things, and people have been debating this for awhile. There have been several cases lately of geckos doing this and ending up dead, I hate to say. Unfortunately it isn't entirely clear what the cause is.
First, IMHO you were wise to remove the gecko from the Eco-Earth, just in case.
Second, a recent thread has suggested that this means a fungal infection or something, which should be treated asap (since the other gecko died). Someone can correct me if I'm wrong, I think it was a fungal infection or mouth rot or something. I think she claimed it was a fungus and the gecko was trying to scratch the fungus off or something, and if she had simply gotten the gecko to the vet for a fungicide in time, the gecko would've lived...
And she was getting mad at people for cautioning against Eco-Earth...
then when we started discussing what that meant and what should be done in such a case, and started a poll asking about people's experiences, she came back and yelled at us that she had very clearly stated the gecko had in fact choked on the Eco-Earth.
So it still isn't clear at all what happened.
I'm not an expert, but IMHO your guy looks really skinny. Do you think it could have an infection?
Please watch it very carefully over the next couple of days. So many times these situations have ended sadly. could you take it to the vet?
*** My "N" key is actig up. Luckily, there's no "N" in "crested gecko" or "Rhacodactylus ciliatus".***
0.1 German Shepherd Dogs
1.1.2 humans (that's 1 adult male, 1 adult female (me), and two male juvies)