Frog mineral systems

[waterbear]

Frog is a silver/zinc system ( does not contain copper and is compatible with bromine too) but they have recently taken references to zinc off their website. Don't know why. Perhaps the zinc had no action. Silver is bacteriostactic but has very slow kill times. If you never used the pool then lower chlorine levels will work. If you use the pool then you need a FC reserve to handle what is introduced into the pool by each bather and you need fast kill times. Remember, every time someone enters a pool or hot tub they introduce sweat, urine and feces--no matter how clean they might be!
IMHO, it is not worth using!

[CarlD]

But the zinc means you won't have to buy Cold-Eze!