I'll look into it. I wish PH wasn't on my list of many things to closely monitor now lol. It's something new every week. By the time my tank matures to my liking I'll end up having to PCS. Thank you for the recommendation!I like the digital Milwaukee ph meter over any colour comparison ph test. I found them too hard to read. The Milwaukee meters are reasonably priced, easy to use and most combine a digital thermometer as well. They also provide me with consistent results and seems to not drift too often. I recalibrate every month or two. I’m still struggling to get above 8.1 at peak photoperiod with a CO2 scrubber but I am not sweating it.