Salt Treatment

I spoke with a MAKC (MidAtlantic Koi Club) Health Hotline Volunteer who recommended a salt treatment to start. We did more precise measurements of the pond and estimated the volume at closer to 17,400 gallons:
40 Feet Long
14.5 Feet Wide (Average)
4 Feet Deep (Average)
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2,320 Cubic Feet
7.481 Gallons / Cu. Ft
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17,356 Gallons

I performed some basic tests of the pond to start:
Temp: 40 degrees F
Ammonia: 0 ppm
Nitrate: 0 ppm
Salt: 0.00 %

I added 80 pounds of Salt to start. The goal is to slowly raise the pond to 0.20% salinity. We estimate that I'll need 2 pounds / 100 gallons. For 17,400 gallons, I'll need to add ~350 pounds. I also, diverted the stream feed, so that the salt would not be diluted.

Once the first 80 pounds is dissolved, I should be able to better estimate the volume of the pond.

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Two hours later, I tested the salinity:
Salt: 0.05 %

The estimate on pond volume appears to be correct.

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Five hours later, I spoke with the MAKC Health Hotline Volunteer. He suggested adding another 80 pounds of salt to bring salinity up and test again.
I tested the salinity to be sure that my prior test had not changed:
Salt: 0.05 %

I then added another 80 pounds of salt. I'll retest in the morning, the salinity should be at 0.10%.

I will be bringing the salinity up to 0.20% over the next few days and try and keep it there until the temperature of the pond reaches 60 degrees.

I've been instructed to treat the pond with ProForm-C when the temp reaches 50 degrees.