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Unread 12/08/2017, 10:16 AM   #11
tmz
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Join Date: Apr 2006
Location: West Seneca NY
Posts: 27,691
Watch the pH if you have a mans to measure it . Soda ash is Na2CO3;baking soda is Na2HCO3. Both are basic but soda ash is more so since it does not contribute any H it will raise pH more precipitously when dosed.Soda ash provides twice the alk by volume vs. baking soda. A rise in pH over say 8.6 will likely occasion precipitation of calcium carbonate. The calcium level doesn't have any effect on pH and won't by itself cause precipitation.

Asuming the calcium measure is correct ,570ppm is on the high edge ,though it shouldn't do any harm and can come down on it's own as calcium carbonate is formed. It can be lowered by using a slat mix with a lower calcium content for water changes.


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