I just got a new liner and new pump this year, so I have all new water (filled partially from a truck, partially from hose) There is no metal in the new water now, but it was very high all last season, so I do have some existing staining on the fiberglass steps. I wanted to a small dose of the ascorbic acid treatment to get them looking bright white again. There is no chlorine in the pool yet, as I just finished filling it last night. If I were to do the ascorbic treatment, should I still not shock for 2 weeks? How do you recommend going about this since I want to get some chlorine in the pool soon, but I also think this is an ideal time to treat the steps