My lights come on around 10 AM. Usually by 2 3 oclock ill start seeing a consistant drop in alk. My lights go off at 8 45 pm. Alk consumption still goes on to about 10:30-11.(the dosing usually keeps it steady around this period) When you have about 2 dkh daily dropping its somewhat easier to track this. Its such a large range of consumption, that you can actually track with aquarium test kits and feel somewhat confident about it. I spent about 3 hannah alk reagents and a salifert test kit on this lol! Between the kalk and alkalinity dosing times, my alkalinity stays perfect. Once i start fragging and adding stuff it goes out of line, so ill just hand dose to make corrections. If my alk were to every drop below 150 ppm, ill up both morning and night 1 ml. Or kalk by 100 ml and see where it lands me. Every week i do about a 15-20 percent water change. At first i was just using reef crystals kept adding about .3-.5 dkh everytime ive done a water change. Now i mix it 5050 with fritz, cashes out about .5 dkh higher then my tank. Barely puts a dent when doing a water change. The calcium times are just there to be dosed. The test kits fields of accuracy are so broad its not even worth the time to go through all of that.
All of this is totally unnessecary