The X3 monitor starter pack is a good one for that. The XS will add 4 more sense ports that will give you 6 sense ports and a pH port. The wifi strips are only 39.99 each and have 4 controllable AC outlet and 4 USB outlets that are controlled as one. That is all you would have to do to start using it as a controller. you will need a command buss cable and a terminator to connect them as one controller. Also you will get push notifications on any device you have app installed on. They do plan on having a couple of wired AC outlet options in the future. I have two of the XS units and an X3 in the collective. If you haven't seen the App here are some screenshots. You can separate your inputs and outputs etc into pages. This is set to the dark mode. I got screenshots of my hex tank page and the page for the storage tanks in the garage. On the inputs if the outer ring is highlighted blue they are within normal limits. The outputs that the outer ring are highlighted blue are on. The ones that are grey are off. The pH, temp and sump full inputs on the first screenshot are from an X3. The sump high, sump low, skimmer full and stand leak 42 are from the XS that is at the tank. The inputs at the storage tanks are a mix of a X4, XS and two X2's.
Is it easy to setup an automatic water change on the hydros? If you don't mind me asking, What kits would I need to do this?