Illness/Sickness: Axolotl hasnt eaten for 3 weeks help

[AndyTheAxolotl]

So my axolotl hasn't eaten since she moved tanks which was around 3 weeks ago, as you can see from the two attachments she hasn't really lost any weight which i find kind of weird and i'm worried as she doesn't look the least bit interested in food when i wiggle it in front of her face.
The new tank that she's in is 150 L and she shares it with two other axolotls which are eating just fine. The ammonia, nitrite and nitrates are all 0 however the temperature is around 20 degrees Celsius due to the NZ summer. The substrate in the tank is sand so i don't think that the full stomach will be from gravel.
I've feed her frozen axolotls fuel from fish fuel co which they claim to be a perfect staple meal and she has eaten these for a while now and hasn't had any problems with eating this food before, the two other axolotls are also happily eating this kind of feed. I've also tried feeding bloodworms and pellets which she also just ignores. So usually when i try feed her i'll be wiggling the food in front of her face for a while, but sometimes she starts backing away from it really fast and then sometimes even swims to the surface of the tank.
I've carefully inspected her and i'm nearly positive that there's no fungus growing on her, there are white spots but i'm pretty sure that it's just part of her coloring as it doesn't seem to be 3d or stick out or be fuzzy.
I've added 3 attachments, 2 pictures of her and 1 picture of the tank.
Any kind of advice would be appreciated whether it's regarding the tank or the axolotl, thank you for reading.

 

[Petersgirl]

Sorry to hear your axxie isn't eating, but you'll be glad to know this isn't an uncommon occurrence.

I had this exact same problem a few weeks ago. My female axxie stopped eating and didn't eat for weeks. She too didn't lose a lot of weight. I came up with two ideas as to the cause - the first was that my tank was too warm, which I solved with an external filter, and the second was that my axolotl was female and reabsorbing her eggs, which seems to mean she doesn't want food while she is doing so.

So my suggestion is this - could your tank temperature be to blame? Or is she doing what both my females have done, and is reabsorbing eggs? Aside from sorting the temperature issue if there is one, you could also try alternate foods. I see you have tried a couple, but what about live earthworms, cockles or blackworm? I found my girl started eating again on cockles, but this might have just been a coincidence and she was just ready to eat again.

Good luck!