DKh is normal.. All water parameters are normal.. I get these tested at RCA regularly as well as I test them regularly. 0 Amonia, 0 Nitrates, 0 nitrites, Calcium mag is great, DKh is fine, Potassium is very very low.... Water PPM is 5-7 going into the tank... as it has been from the start.. Algae problem comes and goes, though this time it was really bad. I do not dose the tank nor do I have a calc reactor. I have a big skimmer and a refugium that is doing well. Ill see about getting a better video of the green stuff to clarify what it may actually be. Urchins and snails do not seem to be eating it at all.