Also, I've gone back and forth on running some kalk in my ATO water just for that purpose. I've going to see how well the sodium hydroxide does before doing that. To you point, everything is doing really well. I probably shouldn't be messing with the tank too much. I couple of vids I just took of some sps. They are just really happy right now.Interesting, your wave form looks good, but your numbers are a bit lower than I’d expect. I wonder if you need to calibrate? Do you have any alternatives to testing pH? By the looks of your Acropora and growth your getting I’d expect pH has to be higher than indicated by your apex. Just my .02
Your tank looks so good, with the growth I just don’t think pH could be that low. Either way. I dose dilute kalk in my top off water and it is a great little pH booster. 3tbsp/8gallon. Works wonders for boosting growth in my system. I barely had to change my all for reef dose because of the increase in uptake.
The 3d printed apogee holder is a game changer, makes it so much easier to focus on the sensor placement not having to figure out what to do with the display.
-TY!
Aquadelight up top (25 days in tank) with a rainbow below.
Just really nice PE on these as well.

