Thought I have a PLC that can basically do anything I can think of, I voted for separate devices.
Upstairs below the tank my T5's ballasts are on a plug-in type timer. In the basement fish room, have my MH ballasts tucked away connected to a hardwired timer and the PLC by the sump on the other side of the room for the heater and evap fans. Don't turn of my pumps for feeding, Ca reactors stable so see no reason to control, my ATO is working perfect with a simple mechanical float valve...
So between how I have things spread out and simplicity of a couple of timers and heat/cool controller, don't see the need for a dedicated aquarium controller. Guess I won't be able able to monitor my tank from across the country but for me, see the novelty wearing off fast with that anyways.
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