A. The blue plus and reef day plus are meant to be used together to create a optimum color spectrum though beware it’s pretty blue and if control and the ability to change the color is your mojo then the OR3s aren’t the right path.Ok
a) Im looking at Orphek OR3 on Amazon and there seems to be 3 kinds... "blue plus", "Day reef plus" and "UV plus" ... Im guessing Day reef plus is the one I should be looking at and comparing?
b) Would 2 kessil 160s do the trick? ... The thing is that If I get the 360x I would get another one at some point in the future and have the pair to get better spread.
c) Same would be with the Hydra
d) No... is just a regular tank I have had for several years empty
B.if you willing to spend money on the a360x why not look into a radion xr15
C. Same thing as B