I've been wanting the Neptune Apex for a long time, I'm trying to figure out what I really "need" it for. I have 2 Radions and 2 Mp10's, I also have the reef link that can control the lights and soon able to control the Mp10's with the reef link. I also have an ATO so the only thing I can really think of that would be useful is -Temp probe for more accurate readings -Ph probe to monitor the ph I don't like how how the models for the apex jump from the JR at 239.99 to the next model priced at 549.99...there should be a mid level point or give us the option to build your own bundle....just my 2 cents. Long story short. What do YOU REALLY use your aquarium controller for?