First off stop using the reef buffer. Opening your doors if applicable or running the skimmer airline outside would more than enough. One thing I've learned from reading threads here is to not chase numbers. Disregard your pH at the moment and just continously check Alk, Cal, phos, nitrate and sometimes Mag. Those the elements you want to monitor first before anything else. DO NOT spike your parameters as it can lead to worst things. Yes it would be nice to have the ideal parameters, but consistency would be more beneficial. Keep up on the husbandry and it will pay off.
For example: Dose X mL of alk and cal daily and measure (try to check parameters at a consistent time. Like check it every three days at noon. Levels can vary depending on the time of day/lighting schedule.) every three days. If you notice a rise or fall with the two parameters, the adjust accordingly. There are some reef tanks that only require water changes to replenish base levels.
There are a lot of test kits available to measure. From photometers to color change test. A lot of people use Hanna checkers since not every one has 20/20 vision. Heck depending on your budget, you can purchase an automated checker that will check the parameters for you.
The moment you can keep up with the aforementioned parameters, you can try to dig in deeper with changing other parameters. As with my other hobbies, I always go with the KISS method. I hope you are enjoying this hobby as much as I do.
