I think stopping the treatment now will be okay, because technically I finished the treatment? It was a 5-day treatment. I went in for 7 days continuously, thinking to do 2 back-to-back treatments, but a full treatment (and then some!) has passed with no breaks.
I'll hold on the salt dip then and see how they do with just the clean water. I'm adding a double dose of prime to it because my tank has no cycle at all going. Ammonia builds quickly, from 0.25ppm to 1.0ppm in 24 hours.
When I do the 70% water change, I'm able to have 60 gallons of that be aged. 70% of 165 gallons is 115 gallons. 60 of which is aged, 55 of which is not, but I do use filter floss in my python to help it degas on its way out. Although... I do have a 72 gallon tank downstairs that's fully cycled... I could do a daily 30% change on that, and steal the water for the upstairs tank... giving me 20 more gallons a day. And the hospital tank is empty, and I'll bet I could age 29 gallons of water in that daily with a 100% change too, which could bring me up to the full amount needed. Hmmmmm.... So many buckets, haha. My arms are developing muscles from the past week, no joke!
Thank you both so much for your recommendations. I'll see how water-water-water works on the little guys, and try and jump start the cycle tomorrow with some seeded media from the 72 gallon.