Yes, there are a lot of variables to consider when looking at raising fish. I’m attempting to control what I have control over, which in this case is how I acclimate the fish. I’ve used both methods advised by others in this thread. I haven’t been successful with either. I pay very close attention to my water quality and can keep all other varieties of freshwater fish and invertebrates alive in my tanks. The guppies have been kicking my ass. For the delivery I’m receiving today I have changed my supplier. Not sure what acclimation method I will use today but I will tweak what I do to reduce stress with some of the information I’m gleaning from reading here and other research. The question is, do I open the bag and immediately net the fish into my tank to avoid Ammonia poisoning or slowly tritrate the shipping bag water with my aquarium water to equalize the ph? There are ways I can improve on both methods from how I’ve done them in the past.