Depending on how they are shipped a slow drip can cause more harm than good. The basic problem is ammonia here, when you get the hermits the ph of the water has dropped most likely significantly. Which is actually a good thing lower ph makes the ammonia less toxic, when you open the bag it allows for gas exchange to easily happen again allowing the ph to start rising again. slow dripping can make this issue worse by raising the ph even more rapidly due to your tank water more than likely having much higher ph. If your having trouble with them with a slow drip process I would skip the acclimation and put them directly into the QT, obviously make sure your not adding the water they come in into the tank.