San Rafael, CA United states Jan 27, 2015 Increase bookmark #three Are you sure you were not employing sodium persulfate (not monopersulfate)? This is not the same as potassium monopersulfate. The focus is probably going to generally be diverse so you might want to dose by different amounts. Sodium persulfate https://pool.net/gartenpool-320-x-125-cm-komplettset.html