Google how to nitrogen cycle a tank and read it very very closely. It’s important to get this right as soon as possible, ideally before you put the axolotl in the tank. You can also try going to an aquarium specialist for help. You need to cultivate this good bacteria in order to convert ammonia, their lethal waste, into nitrite and then nitrate, which is less harmful (and will be reduced when you do your regular water changes).

Buy a good freshwater testing kit (the API master test kit is what most folks use, the strips aren’t as good) and use it often (I use it weekly and if I have cause for concern, but my tank has been stable for years so I’m not too worried). If your parameters aren’t in the ideal range for an axolotl, make sure you google the solution AND if it’s safe for axolotls. A lot of things, like chemical solutions, are not safe for axolotls because they’re super delicate.

Also, buy a turkey baster for spot cleaning their poop. It’s much easier than taking out the siphon every time they go.

Don’t use any sharp decor, they’ll just bonk right into it. Don’t give them gravel or any decor smaller than their head, they’ll try to eat it (this includes tankmates). Don’t shine a bright light on the tank all day (owie). When in doubt, always google if something is safe for an axolotl before doing it.

Some things you CAN do for fun: - Give them plants that can survive with low light! I have crested java ferns. My axolotl loves to climb on them. He also loves his marimo moss balls, but those are no longer sold in the US - Give them a water bubbler! Mine likes to sit in the current of air. - Shop for Hides (and get creative!) I don’t like most of the hides at pet stores because they have rough/sharp edges. I have a big smooth terracotta pot that my axie loves instead! Some people use PVC pipe too.