I don’t use a calcium reactor (seems to complicated for my brain and looks like a bomb! lol) but i do dose the foundation elements daily and the trace elements are replaced via Red Sea Coral Colours so basically everything needed is re added as it’s used up. And most bad stuff is removed with the skimmer, activated carbon, Nopox, rhowaphos and Purigen. So hence my thinking. Precisely Simon! Lol It probably will be the long old debate for years to come so ‘you makes your choice’. The mixing station is on!