@Delaney
Ok, first, the stinky water, the stench, how bad is it? Like, can you smell it from like 5 feet away?
Second, what type of filter do you have? I recommend, highly recommend a sponge filter and if you're having issues with water transparency, I would actually get two and use them both at the same time in the tank, if you have the room. That's what I do with mine, keeps her water crystal clear.
Third, what size tank do you have? 10 gallon, 20?
Fourth, can you post some photos of your tank set up, like showing what you have and then get us a photo of your axolotl. Don't stress them by taking them out of the tank.
And just to clarify, I say this a lot because I wish someone would have told me about it soon, but the tank cycle for a sponge filter goes as follows...
1 = add axolotl to tank. 2 = axolotl produces waste, that leads to ammonia in the water. 3 = sponge filter slowly converts the ammonia into nitrites. 4 = filter slowly converts the nitrites to nitrates. 5 = nitrates are the end of the cycle, you have to do a water change.
And be aware that a tank cycle takes usually 30 days, a whole month. So you need to be vigilant and check your ammonia and all that at least once every two days, that's what I did and I was able to catch a night when my axolotl had really high nitrites. Ammonia being high will cause burns, nitrites will make them sluggish and lethargic, nitrates I think deprive them of oxygen. You want your ammonia and nitrites at 0, of course, and I think nitrates are 20-60.
What are you using to text with? Like, what kit. I use an API Fresh Water Master Kit, and it's super accurate, super easy to use, and it has saved my axolotl's life. And as for the pH, it should be like 7.5.
If any of this sounded redundant and you know all of it already, I apologize. I am only speaking from experience as I, unintentionally, reset my poor axolotls tank cycle back in August. Oh and I hate to say this but if you do buy a sponge filter, make sure the pet store actually has air pumps for you. I HATE when they sell the sponge filters and not the pumps or they're out of them, or out of hose, like, I REALLY hate that.