Reefer Matt
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Add an appropriate amount of acid and aerate the water until the ph comes back up (This creates CO2 in the water). I use 9 grams of Seachem Acid Buffer per 30 gallons of new Reef Crystals saltwater to get to 8.5 dkh alk. I use a powerhead with an air line attached to aerate the water. It takes a day to get the ph back up. This is done inside a brute trash can.How do you adjust it down? just dilution?