Why Is My Axolotl Vomiting?

[AG9]

My axolotl has been throwing up for a couple of days. He eats small red wiggler earth worms, and I usually give him a couple. I gave him extra worms on sunday because he kept begging, so I thought he was hungry. He threw up that night. The water was a little warm so I cool shim down, thinking that would make him more comfortable. I fed him two very little worms to acclimate him again and this morning (Tuesday) to find he'd thrown up again. His tank is cycled and the temperature is under control (between 68-70 degrees F). My chiller should be here by the beginning of next week.
I'm very very worried, he seems alert and active, healthy otherwise.

 

[Skudo09]

What are the parameters for ammonia, nitrite, nitrate and PH? Could you try some different kind of earthworm such as night crawlers? Some axolotls dislike red wigglers as they excrete a foul tasting substance. The temperature is not dangerously high but it may be worth cooling it down a little more.

 

[AG9]

Ammonia 0, Nitrite 0, Nitrate 20.
He seems healthy and active otherwise, just is having a tough time keeping food down.

 

[Skudo09]

It may be that he has been overfed a little. Maybe cut back on how much you offer in a meal and see if that helps?