Ok so here is my situation I had about 175 lbs of old pukani rock and it had a lot of algae on it bought it of of fb market place. So I decided to bleach it I used 3 gallons of regular bleach and about a half to 3/4 no spill bleach. I saw the water foaming I rinsed a bunch of times just letting the hose run in the barrel now its drying. Any worries on the no spill bleach?