I calculate about 8 lbs of salt per 500 gallons would give you Cecil's recommended 2000 mg/liter.....if I did the math correctly
Depends on how close you want to be Bill.
OTOH it would probably be a good idea to check my math!
I got 8.326 lbs. or 8 lbs. 5.2 oz.
1 mg/l = 0.00378 gms./ gal.
2000 mgl ( 0.2 percent or 2 ppt) = 0.00378 X 2000 = 7.56 gms./ gal.
500 gal. x 7.56 gms. = 3,780 gms. divided by 454 = 8.326 lbs. or 8 lbs. 5.2 oz.
That is if Bruce does not already have some significant salinity in his water supply. I seem to remember at his original ranch the salinity was already 0.5 percent ( 5000 mg/l or 5 ppt). Was that the case Bruce?