I will be careful as they are so exspensive, it is hard to just dump them in. I delute, pour around the sides and brush often. making use of every ounce of it. And with the use of Iron Rid in between, it works just great. I will recommend this place to all my pool and hot tub friends. Great place.
2 OZ. to 5000 gal., is just fine for start up, and half that for normal use.