calcium question

[JTM4UG]

Is a water change evry 2 or 3 days enough to keep 2 sps colonies or do I need to use additives

 

[stingythingy45]

Well,that can get kind of expensive and time consuming.
I started with using 2 part calcium and alk.

 

[frank180reef]

I would also recommend using 2 part, with mag