I've been using the Apex controller for my reef for years, and for the most part once it is set up, I don't touch it. If it works, I'm happy. Occasionally I get motivated to make some changes, be it because some equipment has failed and had to be replaced, or something was upgraded. I tend to resist change, believe it or not. I know that sounds odd from a guy that tries out new products and loves gear, but when you reef is happy you normally don't change anything to avoid causing problems.