No, it just means that there is no dissolved metal in the water right now because it is already deposited as stain. the ascorbic acid treatment will cause it to redissolve back into the water.
Re: Acid treatment, but no circulate
No, it just means that there is no dissolved metal in the water right now because it is already deposited as stain. the ascorbic acid treatment will cause it to redissolve back into the water.
Retired pool store and commercial pool maintenance guy.
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