Rainwater and hardness

solarboy

Well-known member
Aug 1, 2010
337
Europe
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 :-D
 

solarboy

Well-known member
Aug 1, 2010
337
Europe
Where I am in Portugal we don't get snow, hence no Calcium Chloride in that form, in fact I am Googling "Clorito de Calcio" and I've not found anything yet.
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,880
Silver Spring, MD
Calcium chloride is also sold in the concrete industry, where it is used to accelerate curing. Neither of the two most common uses (deicing & concrete accelerant) are common in warm/tropical areas, where it can be rather difficult to find calcium chloride.
 
G

Guest

JasonLion said:
Calcium chloride is also sold for the concrete industry where it is used to accelerate curing. Neither of those uses are common in warm/tropical areas, where it can be rather difficult to find.
Huh???
 

solarboy

Well-known member
Aug 1, 2010
337
Europe
Yep, I've poured a lot of concrete and not ever needed an accelerator. I did find some vague agricultural links but nothing useful yet.
 

solarboy

Well-known member
Aug 1, 2010
337
Europe
OK, sorry to bump this but I didn't get resolution last time and I have since found out that I can use Calcium Hydroxide, of which I have plenty but it will impact pH. I also haven't a clue on the dosing. Can anyone help with this?
 

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