Just googling, it appears that some use salt and some run the other direction, real fast. Appears that some who use salt in aquaponics, use sea salt.
Have to look into this further tho. May put a kink in a few things.
Some plants are salt tolerant at low levels. Most are not.
Define the salt you are using. If the pkg is blue with a gal and umbrella, probably the wrong stuff in the first place.
I need to look into this further tho.
