How long will Control III last?
The concentrated form, in the original container, has a 5 year shelf life. However, once the diluted solution of one ounce of Control III to one gallon of water has been mixed, it can be used for up to 14 days. If the diluted solution becomes noticeably dirty then it should be changed sooner, even if 14 days has not passed. The Home Care Kit comes with Control III Test Strips which once immersed in the diluted solution will change color to indicate if the solution is still active and effective.
