Hi Roger, I have seen recomendations 'as high as'...1 quart per 250 gals of water....in a new system.

I don't remember how much I gave my system when I 1st started it. I think I did the guy thing, and poured in some and said...that looks about right...
I guess it was a cup or so and I had about a 1,000 gals. I did dose it once a week like that, for about a month or so.
It will make the water dark. But that will lighten up in a few days.


I use it as a spray too. About a 1/4 to 1/2 teaspoon per gallon....and about the same amount of molasses.