Calculate for Acids to drop KH

[flores]

via Plantbrain: http://www.barrreport.com/showthread.php/7234-Wet-s-EI-modeling-dosing-calculator?p=81917#post81917

Acids to remove KH: H3PO4(30%), HCL(30%) pool acid, Vinegar distilled 5% as acetic acid. Not sure if you can come up with how much to add to lower KH, but these 3 are the most commonly used acids for this purpose.