wbrown;720197 wrote: I found someone more knowledgeable to disagree for me

From reefcleaners website:
1. Float the bag in your tank to get the snail used to the temperature in your aquarium.
2. Wait 15 minutes.
3. Add animals to the tank, discard shipping water and any towels used in the packaging.
Important: Snails may go through shock during shipping, and be closed when they arrive. You should give them plenty of time to come out of their shells and move around before deciding they didn't make the trip. Ceriths may go dormant for up to 3 days.
You may find this to be different than the acclimation procedure you are used to carrying out. The reason we now ask our customers to use this procedure is because our snails and crabs live intertidally, and can handle swings in ph/salinity without a problem. However, what they can't handle is toxic levels of ammonia. During the shipping process, ammonia levels in the shipping bags build, while the ph level goes down. As the ph goes down the toxicity of ammonia also goes down. However, when your tank water with normal ph is introduced to the shipping bags, and the ph rises, so does the toxicity of the ammonia, and you will be poisoning the livestock. Please don't do this and certainly never let livestock sit out in buckets with shipping water exposed to fresh air for a long period of time, we know of no surer way to kill your new arrivals. Any other method of acclimation voids the Alive Arrival Guarantee. It is an easy method of acclimation and it works fine, please follow it.