Just an FYI for anybody getting fish shipped to them. A long drip acclimation exposes fish to a dangerous amount of ammonia. It doesn't pose a problem during the shipping process because the CO2 produced by the fish can't escape, which lowers the ph of the water. This in turn renders the ammonia harmless. However, once the bag is opened the CO2 can escape, the ph rises, and the ammonia becomes toxic again. This contact with ammonia can cause permanent damage to the gills, so even if the fish survives a long acclimation it may still die a few days later.
Shipped fish need to get out of the water in the bag as soon as possible.