I just started using the core 7 other methods. I was running Kalk in my ATO but switched to plain RO/DI when I started the Triton. My pH was steady around 8 on Kalk but since switching to core 7 my pH is steadily decreasing. My high now is 7.8 during the day and 7.65 at night after 48 hours. I have high Co2 in my home and use a Co2 scrubber. How Can I get my pH rack up into the 8 range. I have a 7 gallon refugium with a large mass of chaeto. I really like the idea of Triton but I want my pH higher.