Hey so the lady at the physan company said that you can use ot continusly at half teaspoon per 50-70 gals
Yes, that comes out to be about the amount in my signature. I never wanted to expose the plants to higher levels because I was unsure what kind of adverse effects might happen. Higher amounts can be used for cleaning purposes, though.
I have never used Physan20 countinuously as a sterilizing agent. Let us know what happens.