Good day everyone! So I just purchased a reactor for my 25 gallon cube, the tank is 6 months old... I am having trouble deciding what to run in my reactor... currently I don't have a skimmer as I am waiting for jbj to send me a replacement to the one that burned up. I am between running carbon and GFO or just carbon or just GFO. Levels in my aquarium have been stabilized for a while. What should I consider running in my reactor? Or should I consider running seomething else? Calcium? Anything Input helps. The tank has a refugium also.