If You Have Really Hard Water
A blend of sodium hexametaphosphate and STPP would give better results than the later alone. IIRC Calgon and other packaged water softeners used sodium hexametaphosphate along other water softening agents including STPP.
L.
http://www.chemistrystore.com/sodiumhexametaphosphate.htm
A blend of sodium hexametaphosphate and STPP would give better results than the later alone. IIRC Calgon and other packaged water softeners used sodium hexametaphosphate along other water softening agents including STPP.
L.
http://www.chemistrystore.com/sodiumhexametaphosphate.htm