What the title says. This is my ph graph over the last few days. Is this normal? I've been battling low ph for a while now. I have my sump light (cfl in Home Depot fixture) on reverse cycle from my DT lights (2 kessil 360we's). My skimmer runs 24/7 (reef octopus 110). Kh at 9.5. And I get plenty of airflow over sump and my wp-25 breaks the surface with every wave.