answer:My hair would get less wet when I wore a swimming cap, and online says that it makes a difference. Two tricks I learned: wet your hair with regular water before going into the pool, and/or put a little bit conditioner on your hair. The first saturates the hair with non-chlorinated water, the second coats the hair—so both can help keep the pool water from soaking too much into your hair. In either case, you put a swimming cap on after the fact (or else the tap water and/or conditioner would just wash out). This Go Ask Alice column on Columbia’s site mentions some shampoos that are designed to get the green out (it also talks about why pool water can turn hair green… I never knew the “why” before!)