Some axolotls are really sensitive to ammonia while others may tolerate it in trace amounts, however, I err on the side of caution, and follow the recommendations of this site. (Also keep in mind that the higher your pH is, the more toxic ammonia is)
What prompted me to take extra steps (like having a filter system installed in my home) was one of my axies had stopped eating, looked horrible, and just was not himself at all. When I got my ammonia down to 0 (finally!), he picked up eating again. This was on the heels of another that had stopped for several weeks!
I would recommend some live plants if you have a talent for that sort of thing (I don't). Java ferns and moss do well in low light. I use java moss and moss balls. That decision is up to you, more plant suggestions can be found at Axolotl Sactuary at the bottom of this page -
Aquascaping.
I use AmQuel+ or Prime to neutralize the ammonia without actually eliminating it. This way, your tank can continue to cycle but your axie should be safe. Of course, you will read 0 Ammonia (or close to it) so don't let that fool you into believing that your tank is done cycling. You will still get nitrite and nitrate spikes during the cycle so you will still have to keep your tank closely monitored until you get through that (water changes will help manage those as well).
As far as feeding bloodworms, many use the jar method. They submerge a small jar on its side and then use a turkey baster to add thawed bloodworms to the jar. Once your axie gets the idea, this makes cleaning up the excess much simpler. (Note: in case you didn't know, it's a good idea to thaw your bloodworms out before adding them as the ice will contain extra proteins that can affect the balance of your tank as well)
You haven't mentioned temp or the other parameters, are those okay?
Lastly, I would suggest getting that bigger tank up and running as axies grow very quickly, also a larger tank would prove easier to keep stable.
