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Old 10-18-2019, 01:13 PM   #5
djmarchand's Avatar
City: Litchfield, Ct/Punta Gorda, Fl
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I worked in the chemical cleaning industry early in my career. We used a 30% solution of muriatic acid in water for dissolving heavy water scale on heat exchanger tubes, the same thing at work in your raw water system. That dilution gives you a solution that is about 10% HCl by weight as commercial muriatic acid is about 32%.

We found that scale dissolving capability dies off at about 5% HCl by weight or about 6 parts water to 1 of acid.

So 15:1 is way too low.

Barnacle Buster is based on phosphoric acid I think. It doesn't produce the same irritating fumes that muriatic acid does, but it doesn't work as well. But it seems to work well enough.

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