Discussions

For the people with hot tubs and using proclear, I was woundering how long before you change yours. I have been using it for a year now and they say to change it every 4 months. For the last couple of time I have been leaving mine in for a couple of weeks longer with no change in how clear the water is. I hate wasting things if they will still be good. I was thinking of just leaving it until I see a difference and then change it and the water? What are the others doing?