if you want to move a big fish like that the best way is get a cooler about three feet long get some heavy duty garbage bags that contractors use to haul building material put the bag into the tank and let the fish swim in then close bag so fish cant get out. put enough water in bag to lift fish out. Put in cooler add more water, do not make bag to tight so if fish jumps bag will not break bag. When you get home take water out of bag so you can add tank water to bag to get fish used to your water. then take enough water out of bag so you can lift into tank, make sure you take water level down so tank does not over flow. once in tank let fish swim out. get oxygen if store has it,take your time adding tank water and put some air stones if you have them good luck Noel