hi there i don't really quarantine just get a pail and put all of them in the pail with the water from the packet with air pump for bout 1hr see weather are they stress or relaxing one corner if most of them are relaxing one corner i'll try on some food droping with mixer of sea weed dry blood worm and the frozen food from henry if all behaving normally and most of it start nibber on the food it should be ok to net it to the main tank but not the water in the pail most of all the water KH must be at least 9 and bove below 14 best for fishes to adapt faster then 5-7KH