I am more wondering if I should be focused on testing for phosphates at all with my planned build. My question to the aquarium guy and anyone reading this is what water parameters (besides salinity and temperature) should I be focusing on for this type of build? Is any testing beyond salinity even necessary? Would I not even need to perform daily water changes? Given the fact that my set up has nutrient hungry species (macroalgae, Zoas, and Xenia’s) could daily water changes actually be harmful because it would deplete the tank of nutrients? How would I know when to perform water changes, if at all? Would I just perform them on a regular schedule, and if so how frequently?Well, he's not giving the best advice, but it isn't "wrong". The problem is, a 100% water change will not remove all (often not even most) of the phosphate in the water.
I really appreciate how helpful everyone has been here. Thank you.