increase ph in reef

My ph has never been above 8.0 it’s been around 7.8. I finally got some ph increase Kent brand. I added two teaspoons and look at it today the PH dropped even more. What’s going on? I’m very concerned the fish might die. I know you should have ph level 8.0 or a little higher. Anybody have any...

I know we are not supposed to chase pH but my readings were consistently low (7.4 at night to 8.1 during the day). We are 2 people, 2 large dogs, 2 chonky cats living in smallish house, so I imagine there is a lot of CO2 causing the low pH. After reading some articles here and other sites, I...