On the positive side, BioGuard dealers have the most extensive training, and BioGuard chemists are probably the most knowledgeable in the pool business.

On the negative side, BioGard / Chemtura has pioneered virtually all of the parasitic developments in pool care, and their computerized dosing program is notorious (at least, here) for CREATING pool problems. For example, we usually see 3 or more cases each season of pools turned to milk as a result of adding large simultaneous doses of calcium chloride and sodium bicarbonate to vinyl pools that never needed calcium in the first place.