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Pool water should be maintained for bather comfort, and grout should withstand that water. Ideally, calcium hardness should be maintained between
75
mg/l and
150
mg/l.Incorrect
Can you please help with this as i cant sem to get past the course onto the next level. I really cant find another answer than what i have put in so im very confused that this is not the correct levels for Calcium levels.
Many Thanks
Hi Carl,
I can see you found the answer.
Kind regards,
Astrid
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