ok my ph is to low ,my meter says 6.5 for 3 days i did a 25 gal water changeover , and it went up just a little and it camne down again my purple bonsay is looking very light in color and 2 other sps are the same , i shut down my calcium reactor and i stop dosing kal. everything else is looking ok ,any advice is appreciated my brain is frozen and one week to go .Im planing on doing another water change tomorrow about te same amount .