Calcium reactors?

[i<3fish]

I am setting up a new reef, and have some questions about more equipment. First off, will I need a calcium reactor for a mixed reef (SPS, LPS, Zoo's, Clams)? Also, where can i find one that doesnt have the CO2 injecter thing? I dont want one of those, just a plain calcium reactor (if they are needed). Thanks

 

[moneyman]

Do you have any other way of adding calcium (2 part additives, kalk)? If not, you'll definitely need a calcium reactor.
What's a CO2 injector thing? Regulator? All calcium reactors need CO2.

 

[i<3fish]

OH! I didnt know all calcium reators need CO2! How else can I add the NEEDED supplements?