Upon receipt of your critters, do NOT allow their acclimation process to exceed 15 minutes. They are ready to be in your tank immediately. Giving them a longer acclimation process will stress them. A good process to follow is to add 1/2 to 1 cup of your tank water to their bags and allow to float for 10-15 minutes. Add to your tank with a net. Discard water down a drain. If you have questions please email or call: 1-727-485-4025. Thank you, John