| Easy math, but why bother?
As already mentioned, Solar Salt is dirt cheap and most ponders dont' have ready access to sea water... but if you have 20,000 gallon fresh water pond just replace 2,000 gallons with sea water (35ppt) to get .035% net. If you wanted to really fine tune it to .03 use 1,700 gallons instead. Of course that assumes that your initial freshwater reading really is 0.00
|