I'm going to be draining my pool this winter to tile it. I was thinking of refilling with rainwater but I would have a problem with lack of hardness causing corrosion, especially as it is a concrete pool.
My well doesn't produce enough to fill my pool nicely, it takes 3 weeks and drags lots of sediment that have to be removed, but other than that it is nice water and easily balances. The well water is used by the house and takes ages to clear up after.
I looked at the price of hardness increaser from my pool supplier. I get this at trade price but even so it was so much money as I need around 15-20 kilos (33-44 lbs).
Is there a cheaper way of raising CH? I have access to things like slaked lime, calcium hydroxide etc
Thanks in advance