Help please

[Untreu]

My axolotl has a piece missing of his head. It has been there for a week and I have tried talking to a few people about it but no luck. I did a water change shortly after I noticed it to see if the problem was something to do with the water but it didnt seem to help. Anyone know what it is?

 

[wolfen]

read Axolotls - Requirements & Water Conditions in Captivity to find ingredients for holtfreters and use 100% holtfreters + 0.2g/l magnesium sulphate, swab area with potassium permanganete (repeat every two days) as well as giving 10 min bath per 24 hr methylene blue + acriflavin (both available at pet shops, use half fish dose, use together), may require additional antibiotic via vet, for more info look up pseudomonas infection.
wash hands before and after interaction, tub axolotl, tank may need full strip clean with bleach and hydrogen peroxide, filter will need full strip and clean, all media replaced, anything that goes in the tank will need either cleaning or replacing, tank cycle will be destroyed and need recycling.

 

[Untreu]

read Axolotls - Requirements & Water Conditions in Captivity to find ingredients for holtfreters and use 100% holtfreters + 0.2g/l magnesium sulphate, swab area with potassium permanganete (repeat every two days) as well as giving 10 min bath per 24 hr methylene blue + acriflavin (both available at pet shops, use half fish dose, use together), may require additional antibiotic via vet, for more info look up pseudomonas infection.
wash hands before and after interaction, tub axolotl, tank may need full strip clean with bleach and hydrogen peroxide, filter will need full strip and clean, all media replaced, anything that goes in the tank will need either cleaning or replacing, tank cycle will be destroyed and need recycling.

I have two axolotls in the same tank but only one has it.

 

[wolfen]

because it is a bacterial infection it is also contagious, this means they will be both need treating and tubbing.
I was wrong with about the bathing it should be tubbed in the mixture for 2-3 days, read here under pseudomonas infection.. https://ambystoma.uky.edu/genetic-stock-center/newsletters/Older_archive/Issues-1-12/archive/Issue 3/09-16brothers.pdf