One of my 3 Eastern Spotted newts has formed a cyst-like bump on the right side of its head and I'm afraid it could affect vision in that eye. I plan on doing a good water change and maybe a test but idk what I'd be looking for in the test. They also have an African Dwarf frog as a tank mate however they cohabitate very well together and don't even interact. My water temperature stays around mid 60's (F°) and they live in a ten gallon and are all about 2 inches each and feeding on bloodworms and the occasional minnow or ghost shrimp if they can catch them.