this is the method i use i dont have a long drawn out acclimation process anymore for fish i temp acclimate then check the salinity if its close i just net them inStop acclimating and just put your fish in right away. Thats what I do, I have the highest survival rate this way. When I acclimated like you did with cups, i had a much lower survival rate... I just open the bags now and drop the fish right in. Havent had any losses until today. Did this with many tangs as wel, yellow tang, regal tang etc...