Please help! Is it a skin problem?

[PDora]

Hi! I’m a beginner of growing an axolotl as a pet. We have him just for 3 months, and just a week ago he started to refuse to eat (feeding him earthworms). I noticed some marks on him and I’m afraid that it is some kind of infection or disease… Please help, because it’s stressing me out..

P.s. water change was done two days ago (50%) and I tasted the water (tubes and liquid drops), they were normal.

 

[wolfen]

although you have said all parameters are normal it would be helpful to know what they are ie.. temperature, ammonia, nitrites, nitrates, ph, kh, gh.
it isn't unusual for an axolotl to refuse a food type, try other food sources (even with a mostly worm fed diet they should be given eyed food as well to provide essential vitamins), always feed a varied balanced diet.
ensure that the sand is turned over regularly to prevent and release any gasses or debris (axolotls like to dig around).
if he has a skin fungal/mold infection treatment would be to house in 100% holtfreters with any patches swabbed with potassium permanganate.

 

[PDora]

although you have said all parameters are normal it would be helpful to know what they are ie.. temperature, ammonia, nitrites, nitrates, ph, kh, gh.
it isn't unusual for an axolotl to refuse a food type, try other food sources (even with a mostly worm fed diet they should be given eyed food as well to provide essential vitamins), always feed a varied balanced diet.
ensure that the sand is turned over regularly to prevent and release any gasses or debris (axolotls like to dig around).
if he has a skin fungal/mold infection treatment would be to house in 100% holtfreters with any patches swabbed with potassium permanganate.

The temperature is 20-21C and I only have these parameters (I will attach the photo). He doesn’t eat defrosted bloodworms( read that it’s like candy for them).

Well I do have a problem with nitrite, because of too much sand(maybe???)… but I’m checking the water parameters every 2-3 days and changing the water 50%.

 

[PDora]

The temperature is 20-21C and I only have these parameters (I will attach the photo). He doesn’t eat defrosted bloodworms( read that it’s like candy for them).

Well I do have a problem with nitrite, because of too much sand(maybe???)… but I’m checking the water parameters every 2-3 days and changing the water 50%.

Also thank you for your answers!

 

[wolfen]

your test results are a bit confusing, 1mg = 1ppm which would mean your NH4 (ammonium, should be NH3+NH4 free-ammonia + ammonium) is 0.05ppm, NO2 (nitrites) are 0.05ppm and your NO3 (nitrates) are 1ppm, normally tests don't measure low enough (nether liquid or stick) and you might be a decimal off, not sure which liquid tests you are using but you might need to check.
if they are off by a decimal nitrites are a concern as well as temperature.
ideally temperature should be between 15°c and 18°c, colder being better.
raised nitrites reduce the bloods ability to transfer oxygen, methylene blue baths are used to treat nitrite toxicosis, chlorides (not to be confused with chlorine or chloramines) help protect against nitrite spikes.
although bloodworms aren't as nutritious as other forms of food they are better than nothing if an axolotl if refusing to eat (because they aren't as high in protein and nutrients they are seen as candy due to axolotls preference to eating them), they can also still be used as part of a varied balanced diet.
sand will become part of the bacterial filtration helping convert/consume ammonia and nitrites by housing aerobic bacteria but if it isn't turned over regularly or anoxic areas develope, gasses that are toxic can form (as well as nitrates being reduced back into nitrites)
ensure the water has good oxygenation for healthy axolotl and bacterial filtration.
reduce tank temperature.
if results are erroneous (NO2 is 0.5mg not 0.05mg) give daily methylene blue baths.
2g/l sodium chloride (non-iodised salt) can be used as protection against nitrogen compounds.
treatment for fungal/mold is as previously given.