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Old 02/22/2018, 06:32 AM   #4
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Join Date: Sep 2003
Location: North Carolina
Posts: 18,540
Yes its very common to use muriatic acid to lower the alk of freshly mixed saltwater prior to adding it to the tank water..

In the future if you want just switch to a salt mix with a lower alk so you don't need to do that..

There is a formula floating around somewhere but..
If you use Muriatic Acid (approximately 33%-35% HCL) bought from a hardware store, you will need to use approximately 0.123 ml of the Muriatic Acid to reduce 1 gallon of salt mix 1 dKH.

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