Quote Originally Posted by powiebaby View Post
... I'll still aim for the ideal reading between 1-3, but won't fret if the Cl registers 4.0 or above at 10am on a hot, sunny Saturday.
As others have posted, knowing the free chlorine level without knowing the CYA level is essentially useless. CYA has a great deal of bearing on how the chlorine will effect bathers, liners, swimsuits, etc. In your case, unless you have very little CYA (like less than 20 ppm), 1-3 ppm is far from ideal. In fact, it could be dangerous as you will have insufficient chlorine to keep your water free from algae let alone sanitary.

Post your CYA level and people here will be more than happy to give you advice that will serve you well.