I need to add liquid CYA and a large amount of calcium to my pool so the water will be balanced before we close it. Last year we had a lot of staining from the algaecides so I want to bump up the calcium level to decrease the chance that this happens again. After I add the liquid CYA to increase CYA levels to 30 or more, how long do I need to wait with the pump running to add the calcium? Both chemicals are supposed to be broadcast around the pool with the pump running so I wasn’t sure how long I needed to wait after adding the liquid CYA before adding the calcium. I also need to know what the best way is to get large amounts of calcium into the water without causing any other problems. I need to add at least 20 pounds of it to get to the manufacture’s recommended minimum level of 250 so I need to know the best way to accomplish this. I assume that I would need to divide up the doses but I wasn’t sure how much to add each time and how long to wait before adding more. I just started maintaining our pool myself so I’m trying to get everything balanced this year before closing it instead of paying someone else to do it.