very good I am so happy to hear it!! You sound like you have a great plan. The stains will probably lift as the metal out does it's job with the lower ph. Just keeping the pucks in will keep your ph under control, as they tend to bring the ph down, and will give you enough stabilized chlorine to keep the pool sanitized. Just make sure you keep testing so that the ph doesn't go too low and damage the pool. Keep us informed.