Expandable Calcium reactors?

[kharn101]

Hello All,
I have a question, as there are lots of sales, I am looking to pull the trigger on a calcium reactor.
With that being said, I am looking for calcium that is expandable.
Currently, I have 90 gallon SPS tank but will be moving to a 300-gallon tank in the near future, i saw geo had UMC; can that be added on to an existing system?
Thanks all for the help!

 

[YOYOYOReefer]

its more about getting the biggest reactor you can so you can fill it with more media.= less media changes.