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Got the kit yesterday and ran the gamut of tests it offers. The only thing I was really surprised by is how low my CYA is. Maybe I'm not doing it right but it tested out to below 20. I did it three times to be sure, over yesterday and today. I find that strange because I'm using pucks for...

My pool is about 15 years old and the plaster is not in great shape so I'm going to do a replaster. During that process, I'd also like to add some kind of automation system to control the valves that activate the fountain feature, which is currently 3 seperate valves to each spigot. (ETA: I...