Hey, looking for some advice. My PH is staying around 6.4 and does'nt budge. My co2 there for wont kick on because my auto ph reading is set for 6.4. so i'm not getting the co2 dosing I am shooting for. Should I add somthing to boost my ph?. Plants look good but I have a mild algea problem(very mild) but i'm striving for perfection. 110 gallon tank, 500 watts lighting, use the florish line of products as directed. Any advice would be greatly appreciated.