no acclimation for me. I float the un opened bag for 15 min. for temp. open the bag and plop them in. an hour or two or four will not acclimate them to a different ph anyway, so why not just get them in your nice clean tank water. it takes days if not weeks for a fish to acclimate to different perameters. this acclimation thing is old school thinking and while it probably does'nt hurt the fish, I can't help to wonder what good everyone thinks they are doing. yes, there are books and experts who say this is the correct way, but you can now find lots of info on disputing this advice. I have done this with salt water, many freshwater, and even my current wild discus which were shipped to me. never had one problem. if you think about it, it makes sense.