Grant - I am happy that your axolotl is so active and that you are enjoying it
But I would like to say...
On May 15 you asked us what kind of water to put in your tank. So it sounded like it was empty at that time.
On May 16 you said you put ammo lock in the tank.
Now on May 18 you have put the axolotl in the tank.
I am only going by what I have read, so please bare with me.
Your friends were incorrect in telling you your tank was cycled in 3 - 7 days. Yes I have seen people put fish in brand new uncycled tanks and some of the fish have lived. Just because some of them can live through the torture of being put in an uncycled tank does not make it the correct way to cycle a tank.
Axolotls are not fish and when your tank goes though the ammonia and nitrite cycle it is going to burn your axolotls gills and skin. There are many posts in the forums from people putting their axolotls into uncycled tanks and then asking for help with their axolotl when its gills curled, shrunk, disappeared, and the axolotl was not acting well.
I know you are trying to do right by your axolotl and I commend you for that. I want your axolotl to be happy and healthy or I would not take the time to type this out on my lunch break, so please do not misunderstand why I am saying this.
Your axolotl would be better off if you would move it to a different container that you can change all of its water in every day while you let your tank cycle. Tank cycling can not be cut short by adding ammo lock and changing part of the water each day. It needs at least 30 days of time to cycle properly with no water changes and no ammo lock.
The only way you know your tank has cycled is you have tested and watched the ammonia reading spike (which takes about a week on its own) and then the nitrite reading spike and then the nitrate reading spike. Once a spike has occurred the ammonia will start to go down, then the nitrite then the nitrate. The tank is not safe until ammonia and nitrite are back to zero and the nitrate reading is low.
Even after the tank has cycled you need to keep a close eye on the readings as there may not be enough bacteria established in the tank to take care of the waste from the axolotl.
Once the tank has cycled you start your 20% water changes on a weekly basis or more frequently as ammonia and nitrite readings indicate.