YAY!! I can see my drain!!!

A huge THANK YOU to all on this forum. you people are incredible. I can finally see my drain and my water is clear thanks to everything I learned on this forum and many specific questions answered by yall'. now back to business.... I have for about a week and a half been keeping my water at shock levels. The water is clear and the chlorine holds all night. I am waiting for ben's test kit to arrive. My plan is to let the chlorine slowly go down to 10ppm-15ppm-its at 25ppm right now. I haven't tested for ph in a while so a little concerned about that. when my cl is around 10ppm how can I test for ph when my walmart kit says you can't test for ph when cl is above 5ppm. I have to keep my cl between 8-10ppm because cya is 95-100. Any thoughts.... does this plan sound right. again thank you for any replies.:)