I have looked into controllers and without breaking the bank. I've looked at the Reefkeeper Lite, I like being able to have temp, pH, ORP, salinity in one unit. I think I'm able to use some float switches from a DIY ATO. I really like the price and reviews for the Jebao power heads and dosing pump so I wouldn't need controllers for those. I'm using corallife LEDs that are programmable as well. I like that it will control my heater... Does anyone have the RK and how do you like it.
What do you want to do with a controller? If you're on a budget you could get a heater controller like Finnex with controller and spend the money elsewhere for other equipment. The one thing I depend on my controller for is protection against heater failure. The Finnex units are very dependable. I would never trust a controller/probe to measure salinity. A good refractometer is cheap. I don't measure ORP. pH and temp monitoring is great but pH probes need to be calibrated frequently and have a limited lifespan. Having said that I love my controller and it greatly improves my ability to manage my tank but I could do with out it. I wouldn't want to but I could. I'm running an Apex but I know several here run RK units and really like them.
I actually have a Finnex heater and titanium heater A controller is not top priority, I just want to know more about them.
I have the apex too. Unlike Doc, I’m not sure I could do without mine! I mean, I keep my little tank going without one but man, it’s sooooo helpful for me in the big tank with $$$$ livestock. I’m super forgetful and the automation really keeps me on track! I love the automation and almost everything controllable from one place. I’m actually thinking about saving up for the newer Apex and some of the add-ons. Mine came with my tank so I can’t say it won’t break the bank ... apexes are pricey. Can’t speak for any other brand.