A question I have been trying to find the answer to myself but I am having no luck. My ph tends to stay between 7.65 and 7.8. I check my alk nightly and it is normally 10.4 dkh to 10.6 dkh. I currently run a c02 scrubber on my skimmer and it has been changed less than a week ago yet it doesn't raise ph much. What are my other options? I've tried kalk but it doesn't give me higher ph without raising alk and calcium to much.