hey guys, i’m about to do a water change for my 30 gallon tank (will be removing 7 adding 7 gallons of new water) and the 7 gallons i mixed have a total ph of 8.5 but my current ph in the tank is 8.14. I was wondering if the vinegar method is approved by one of you? i’d like to lower the ph to at least 8.2-8.3 and read that 1ml per gallon lowers ph by .3. would i then add 7ml and it’d still be safe for my fish? help! thanks!