How long do you leave fish in bag before putting in tank?
Adding the Fish
Allow the bag to sit for ten minutes, then open the bag and add a cup of your aquarium’s water to it. Reseal the bag and let it float again for ten minutes. Repeat the previous step until the bag is full. Then, you can use a net to transfer the fish from the bag into the tank.
What happens if you don’t acclimate fish?
Osmoregulation is the fish’s ability to control the ratio of salt to water within its body. A sudden change in salinity can cause acute distress known as Osmotic Shock which usually leads to death within 2-3 days. Osmotic Shock is usually one of the biggest killers of fish when not properly acclimated.