A good rule of thumb to follow when transporting fish (and using pure O2 for aeration) is 1/2# of fish per gallon of water. There's a whole lot of things to do when transporting fish and acclimating them to the new pond. Salt dip to minimize moving disease or invasive species, etc., etc. Fish transport best at 55-65 degree water temp, but then getting them acclimated to the new water temp takes a LOT of time.
