I've been battling green algee all spring, I bump my cl up to 15ppm with bleech every night, CYA is 32 cl is 5 right now. I have read that no matter what my TC level is only FC will kill off the algee. I've ordered the Taylor K2006 test kit and await it's arrival. In the mean time how do I raise the free clorine level to kill off the algee.