So I knkw dosing all for reef is tricky when you first start but I also read that once you get the science part and your levels are not going up and down then it good. I have been thinking of using all for reef but currently I am working on bring one of me perimeters level down. I am currently dosing mag and calcium manually but been thinking of buying myself a redsea dosing unit but not sure if inshould get the 4 head one or the two head one because I am thinking thag ones I get all my water perimeters to where they should be just to dose one thing instead of multiple. Would the group recomend getting the 4 head and dosing individual or just get the 2 head and dose all for reef and something else?