Has anyone used muriatic acid to clean rock ? is it reefsafe after cleaning with water ?
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This is what happens when you mix muratic acid and bleach:
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Use undiluted distilled white vinegar, give the rock a good freshwater soaking afterwards and call it good.
The other option is using bleach then a good long soaking in fresh water with maybe some sodium thiosulfate added but I would never do acid and bleach both, too risky.