Well if your keeping it, lights should be already on a timer and heater on a thermostat or controller. Advantage of a controller or even something as simple as a
Ranco is they can control the heater and a fan for evaporation cooling.
Rather than manually dosing 2-part, can use a dual channel dosing pump,
GreenSpottedPuffer has a good deal on his or consider a Ca reactor.
ATO is though one of the greatest things. Can be a simple
$10 humidifier float and reservoir or live on the edge and connect directly to a ro/di unit.