I've been testing my alk, ca, and ph about 3 times per day. I can literally watch the alk and ca drop throughout the day. I've been dosing 3 tbsp. of the 2-part solution stuff per day. The article I read, the guy was dosing that amount on his 50g. I started with 1 tbsp, and worked up to 3.
My alk drops during the day from about 10.2 dkh to about 8.5 dkh (natural seawater is about 8 dkh). I like to keep my alk at about 10 dkh. My ca drops about 50 ppm per day from 450 ppm to 400 ppm.
Until I went on vacation, my parameters were all stable, and I didn't have to dose anything. My weekly 10% water changes accounted for all nutrient uptake. I was gone one week, and my system has completely changed. What happened??? I know I have a lot more stony corals than I used to, but this drastic?
I will say, on a couple of the corals, I'm literally watching them grow now. It's nuts!