Sorry for the slow response. Thank you for advice.
When I came to do the tea bath two nights ago, I realised Harvey had a tiny, tiny white patch on his lowermost gill. It was hard to see what it was so I didn't do the tea bath incase and then next morning he had a full clump of fungus.
I had been scrubbing my hands in between touching either of them and sterilising all tubs with boiling water before I did water changes and using different cloths for each tub to wash before sterilising but somehow he still caught the same fungus.
I'm now doing twice daily salt baths and changing their water once a day using Stress coat and 1.5 as much Aqua Safe to remove the chlorine and chloramines, also keeping the water in the fridge with them too. I've been treating Henry with Myxazin for four days and Harvey for the past two (one drop per litre, they're in 3 litres in their tubs) but it doesn't seem to be helping. I went to the pet shop and they've advised I start them on something called 'Interpet Anti fungus and Fin Rot' at half the dosage stated on the bottle (they phoned someone who kept axolotls for advice). I can't find anything on the internet about whether or not this is safe for them though. Has anyone used it before?
The active ingredient is Phenoxyethanol and its 1ml for 2.5 litres, they recommended I stop the Myxazin and use this instead.
I think their water is now ok: ammonia is 0, no nitrites and nitrates at 10ppm. I got this tested in the shop to be sure as I'd heard the strips are not as accurate. pH was only at 7 though - should I be raising this? The shop advised something called 'pH Up' - but on reading, the advised dose is 2.5ml per 95 litres, so I've realised there is no way I can use it in only 3 litre tubs. Would a drop per tub be too much? Also I know their ideal is 7.4- 7.6 but I've also read anything around 7 is ok.
The vet I phoned was unable to give much advice and the water company didn't give me the hardness levels or calcium levels, they said they haven't added anything new to the water at all recently. The water in this area is very soft. I couldn't find a kit in the shop that would give me hardness or GH levels, they were either pH testing kits or specific kits for ammonia etc. What should I do about this? They have been ok in the tap water here for 8 years and the water company claim it hasn't changed so I still don't know what caused it in the first place and whether it is affecting their fungus now.
Any advice welcome. Harvey has one large fluff on fungus on one gill and Henry now has it on all gills in little tufts. I'm really worried as although it hasn't got worse since yesterday it doesn't seem to have got better either.
Thank you for reading, sorry it got so long!
Esther