Axolotls gills won’t grow back

[Day]

This has been going on for about 2-3 months now. I’ve done everything to my ability and I’m at my wits end.

Her current state:
She doesn’t have “hair” on her gills and there’s red things coming out of them; looks like veins. I can see red veins all around her body. She still has an appetite which I’m happy about.

What I have done to try and fix this:
Firstly I’ve done a full water change and let it cycle before putting her into the tank, didn’t work.
Secondly, I did a 50% water change 2 weeks ago. Didn’t work.
The water levels are PERFECT!
I use the API master water test kit.
pH is 7.0, ammonia is 0, nitrate 0, nitrite 0.
Thirdly, I’ve been feeding her night crawlers since she’s been able to eat them and she has no appetite loss; she’s eating fine.

I currently have her sitting in furan 2 (recommended by her breeder when I got her years ago) and it’s been 24 hours so far.
If this doesn’t work, I will be changing her food. Otherwise, I’ve done everything I could.

 

[wolfen]

there is either a problem with your cycle or a. your tank is heavily planted, b. you have other means of nitrate removal ie.. special nitrate media, nitrate reactor etc.. ,c. your nitrate test is wrong, you shouldn't have zero nitrates in a cycled tank.
your ph is low, use enough bicarbonate of soda to increase ph to 7.4 - 7.6, test kh gh, soft water isn't good for axolotls.
increase tank water oxygen with air-stone.
increasing water salinity is known to encourage gill growth, add 2g/l salt.
due to the red veins give her methyline blue baths, half fish dose as describe on bottle 10mins per 24hr.

 

[Day]

there is either a problem with your cycle or a. your tank is heavily planted, b. you have other means of nitrate removal ie.. special nitrate media, nitrate reactor etc.. ,c. your nitrate test is wrong, you shouldn't have zero nitrates in a cycled tank.
your ph is low, use enough bicarbonate of soda to increase ph to 7.4 - 7.6, test kh gh, soft water isn't good for axolotls.
increase tank water oxygen with air-stone.
increasing water salinity is known to encourage gill growth, add 2g/l salt.
due to the red veins give her methyline blue baths, half fish dose as describe on bottle 10mins per 24hr.

Thank you so much, I’ll be trying all of these. I’m not sure where to get the bio thing from though. What type of salt do I use and how much for a 36 gallon tank? Can I use Melafix for the methyline blue and api aquarium salt??

 

[wolfen]

bicarbonate of soda is also known as sodium bicarbonate and baking soda (easily brought in most stores), melafix is produced from tea tree where as methyline blue is a chemical (Methylthioninium chloride), it should also be noted that although melafix is marked as safe for axolotls it is also marked as vet directed as well, methyline blue is used for fungul conditions and conditions which effect the blood, where as melafix is for bacterial infections and fungul issues including wounds.
328 grams of salt for 36 imperial gallon tank (U.K. etc..) 272 grams of salt for 36 U.S. gallon tank. api aquarium salt is fine as it is just sea salt, marine salt can also be used as can unrefined himalayan salt, the main issue is that it has to be non-iodinised (contains no iodine) salt.

 

[Day]

bicarbonate of soda is also known as sodium bicarbonate and baking soda (easily brought in most stores), melafix is produced from tea tree where as methyline blue is a chemical (Methylthioninium chloride), it should also be noted that although melafix is marked as safe for axolotls it is also marked as vet directed as well, methyline blue is used for fungul conditions and conditions which effect the blood, where as melafix is for bacterial infections and fungul issues including wounds.
328 grams of salt for 36 imperial gallon tank (U.K. etc..) 272 grams of salt for 36 U.S. gallon tank. api aquarium salt is fine as it is just sea salt, marine salt can also be used as can unrefined himalayan salt, the main issue is that it has to be non-iodinised (contains no iodine) salt.

Do I leave her in there with the salt? Or is it just suppose to be a salt bath? I moved her to a 20 gallon since I’m selling my 36 gallon.

Had to start fresh cause I noticed I did the test wrong. The 36 gallon tank water was p.h 7.6, ammonia 0, nitrite 0 and nitrate 160 ppm!! Awful.

Water levels are currently pH 7.6, ammonia, 0, nitrite 0 and Nitrate 5.0 ppm in the 20 gallon tank.

According to api I have to add 1 tbsp per 5 US gallon. So do I had 4 tbsp? My fear is turning my tank into a salt water tank which is something I really don’t want

 

[wolfen]

the salt amount previously given ie.. 272 grams is for the tank which is 2 grams per litre, salt baths are 10+ grams per litre.
1 tbsp salt per 5 gallon is approx 18g per 19 litre, which is just less than 1 gram per litre.
the salt is used permanently in the tank with her (this also means replacing lost salt after water change) this offers protection against slight ammonia fluctuations as well as help protect against skin/gill issue such as fungus, axolotls are a slight brackish animal although captive breed axolotls can't tolerate the salt levels that wild axolotls are subjected to for long periods (in some areas the salinity is as high as 9 g/l)