Thanks, Charlie, I think so too :D
As all of you know, I'm incredibly impatient, especially when I buy fish from my FB group who always have such healthy fish/axolotls (except for Mischa, but I knew what I was getting into with her) and so as soon as Ned had some time to relax and I knew he was eating (seriously he's a pig, he'll eat anything I put in front of him) I put him in the 55. It's been about ten minutes and it's going well. The four of them are clumped together in the corner right now and Ned is climbing all over the PVC pipe. The others are uninterested in him so far. The filter is on pretty high right now, when I put the fresh water in it stirred up the PVC and apparently there was a bunch of crap hiding under that. I'm planning on trying to stop the flow from being so heavy with water bottles so I can keep it on as strong as it is, try and keep the tank cleaner for them. I'm also thinking of adding a bubbler, get more air flow in there, I've seen Crowley going up to the surface more often in the last couple of days. Hopefully it all won't prove to be too stressful for them; I'll be keeping a watchful eye to make sure they're fine.
Hopefully I can update with pictures today or tomorrow!