Prior owners used 99% Trichloro-S-Triazinetrione 3' tablets. Just purchased Clorox Xtra Blue 3' tablets that are 95% Trichloro-S-Triazinetrione and 5% secret ingredients that help keep water blue, dissolve corrosion, and dissolve slower. Do you think these extra ingredients are good and safe or am I better off finding a 99%? Seems that more chemicals, especially ones that dissolve corrosion may be more toxic to people and not necessarily be better for the pool. Please help this newbie. Thanks.