I would use box if possible given the Katherine's is so established. Do you have a QT or another tank so you can do them one at a time?getting 3 wrasses next week:
hooded fairy wrasse, crescent wrasse and exquisite wrasse.
all females if that makes a big difference. should i just released in tank or acclimation box? the box is 10/5/5. not sure if mine will be big enough for 3 fish... right now the only fairy is male katherines wrasse. he has been in tank for maybe 7 months. thx!!