I have listed this on marketplace but wanted to offer it here as well. I have it listed there for 600 for well discount by 50 bucks if you mention you saw it here on Ohio reef. There are pictures and the marketplace ad
https://www.facebook.com/marketplace/item/405205345105585/I used to have 5 separate SW aquarium systems run via this Apex controller and auto top off system.
It is an apex classic with 7 X EB8 controlled outlets, 4 x PM2 modules for temperature and float switch inputs, an ALD leak detection module and 4 sensors and associated float switches with 5 x homemade breakout box for the float inputs. Plus the RODI unit with spare filters and media.
This would run my pumps, heaters, lights etc on each setup. Additionally I have the water change setup that will use the RO unit to top off the tanks, then drain a gallon of water and refill with a gallon of fresh saltwater. All automatically every day. All you need to do is make new saltwater when it?s needed