OK so I am not understanding why my ph is fluctuating so much. Before I went to bed last night I changed my reservoir and ph my water to 5.7 and left it alone. when I wake up its at 7.2 so I put 2mL of Earth Juice Natural Down. I check it thirty minutes later and ph is at 6.4 so I leave it alone... Came back two hours later to check ph again and its at the same but I noticed my water is all Cloudy already and I assume it was from the ph down so I leave it be to settle. I come back another two hours later and its still cloudy and on top of that my ph is 7.2 again. I dont understand what Iam doing wrong. Why is does my ph not want to go down??? And also does anyone think my reservoir is Cloudy from the ph down? I dont think it can be algae because my res. is light proof and ialso changed it last night, but im still technically a nooB so idk.My ppm is still averaging 145 with plain tap and no nutes and my water temp is around 70 degrees. Any help will be much appreciated!!!!!!