What are you trying to feed them? If you lived close, I'd scour the two tanks that have bladder snails and give you the lot!
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IMO it sounds like they're sick. Your trates are a bit high, do a 50% water change today. Curled tails usually are a sign of sickness in dwarf puffs. They could also just be stressed. How did you acclimate? How long?
5 minutes isn't long enough for me. I float the bag to acclimate temp and then drip acclimate by adding water to double , dump half and repeat a few times.
could be a shock to them if water temp was way different.
So you just let the temp match and then let em in without adding water or anything? Puffs are way to sensitive for that. A good 2 hour or longer drip acclimation is what most people would do with more sensitive animals like puffs.