nvcdl, when someone says "X" pounds per acre, that isn't an accurate amount. An acre is a flat measurement, where pond water volume is measured in acre feet and one acre foot of water is one acre of water 12" deep. An acre foot of water has 325,851 gallons of water in it.
When fish are transported, the recommendation is to add 1.5# of salt to every 100 gallons of water. So, to treat one acre foot of water "to transport fish" you would need 4,888# of salt....... When I haul fish, I am typically carrying 1,200 gallons of water and use approximately 4 cups of that Morton Solar salt per 100 gallons of water with other conditioning agents and ammonia neutralizers. I was using "stock salt" but was finding white sand residue in the bottom of the haul tanks.
You might want to read this, and pay attention to the PPT dosage of salt and the time the fish can be in that concentration.
https://www.aquaculturealliance.org/advocate/common-salt-a-useful-tool-in-aquaculture-part-1/
