cleaner you've ever seen? It helped me get some calcium deposits off the spa spillover. I pulled all the jets and the drain covers off and soaked them in dilluted mriatic acid and it whitened them up. I love me some muriatic acid.
Is Muriatic Acid the best...
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Remember though that everytime you clean grout, mortar, concrete, brick, etc. with it that it's eating some of the material away.
