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Current IssueJuly 23, 2014
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Ask The Expert: Soda ash as a regenerant
07/08/2003 
 
Question: Q: We've been using soda ash in our softener at our deep water well... Is this safe/effective? Thanks.

L. Holland  

Answer: A: Soda ash is a particularly poor choice to regenerate a softener. Soda ash is sodium carbonate. By definition a softener is removing hardness (calcium and magnesium) so, when you try to regenerate with soda ash, the high alkalinity present (due to the carbonate) will form calcium carbonate, which is nearly insoluble and will scale-up the resin, tank and internals. For this reason, common salt (NaCl) is used to regenerate softeners. Calcium and magnesium chlorides are much more soluble than the carbonate salts. Hope this helps.

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