I have a 150 gallon tank with fish and lots of coral. I want to add a calcium reactor. I have ruled it down to three: Korallin, Midwest Aquatics, or Knop. I am leaning towards the Korallin. I need a small foot print 8" or less. Will the 1502 supply my tank with enough calcium? I know they are rated up to 400g but someone had said that with his 135g he is still adding CA. I was thinking about going with the 3002 which hold double the media. Will the pump on the Korallin also be able to draw out of my sump? I appreciate any input as I want to make sure I have the right equipment.