I would say that the 6 gallon tank is too small even for the fish...much less the nem. If you are serious about this species, then you should have researched it to greater lenght and I'm sure that you would have understood that this nem should be placed in a much bigger set up where, as mentioned before, the water params will not fluctuate as fast. "Fluctuate" being the key word here...not good or bad water. But fluctuating water. Even by doing daily water changes automatically, you are changing the params...maybe for the better, but they are still changing rapidly in such a small system (26 gallons total, give or take?).
if it pulls through, and I hope it does, then I would say that at the first available chance of it being safely moved, that you should put it in a much larger system...but I would still follow the "carpet god's" advice on here before, durring, and after that point. They know what they are talking about.
good luck.