This is my first posting of a question, so I'm trying to explain everything.

I need to drain some water from my pool. It's a plaster pool with a row of 3 2x2" tiles on the water line, so we keep the water level to the middle of tiles - 3 inches above the plaster.

About one inch of water is 500 gallons and the pool holds about 29,000 gallons. So if I drain it to the bottom of the tiles, it would be about 3 inches or 1500 gallons.

My water comes from a well and goes through a water softner. The water softner can treat about 1000 gallons per day, and there's a 1200 gallon holding tank that gets filled at 3 gallons per minute. So I really can't put more than about 700 gallons a day into the pool.

So with all this infomation, my question is, if I drain 12 inches of water from the pool (6000 gallons) and the water drops below the tile exposing the plaster and then fill it at 1-1/2 inches per day, so the plaster at the very top is exposed for 6 days is that bad?

And if it's not bad, could I drain even more and slowly refill it?

Thanks.