Filling the pool after plastering

[MarkC]

I would bypass the softener and use regular water for the fill. You want the water to have some calcium hardness in it. I also came across this statement on another web site:
maintain the pH at 7.2-7.6, the total alkalinity at 80-120 PPM and the calcium Hardness at 150-200 PPM. This will help keep the walls from being etched. If the water is soft or has a calcium hardness below 150 PPM, you must add calcium hardness increaser to the pool or the pool water will extract calcium from the walls.

[JonnyG]

I asked the local pool store guy (he's the owner and seems pretty knowledgeable and he also didn't try to sell me anything). He said that it would take years for the lack of calcium in the water to cause damage to the plaster. He suggested a few weeks after filling the pool that I add in calcium based on the water chemistry at that time. He is also felt it would be easier to deal with the Calcium problem of softened water then the Iron problem of the unsoftened water. Sounds pretty reasonable, what do you all think?

JonnyG