FROG Bac Pac Replacement Chlorine Cartridges for use with Pool FROG Model 5400 and 6100 Cyclers - Prefilled for Easy & Convenient Pool Sanitizing & Water Care - 12 Pack

Good

Easy to use, lasts a long time, frog brand is the way to go

Came packed well ... Love buying the season at once very convenient

Arrived in good condition .

Have ordered multiple time, great price fast shipping.

New to the frog system....We ordered this and I've had my watered tested twice. It shows I've hardly got any chlorine in my pool!!! It's so cloudy and I've spent $$$ now I'm reading it's probably this ...frustrating! Save money and just go to the pool store!

Easy to use but have gotten way too expensive. I would install something different if I were to do it all over again.

We buy these every month and they show up very fast. Of coarse they are pump specific but they make pool life super easy.