Steampunk is exactly what I was going for with the light/fan/filter no the res is a 200l water butt.
And I did it using sonoffs mate th16 controlling the brains return pump. 4ch pro r2 controls feed pump. Water heater. Light. Air pump.
A few holes drilled m25 cable glands with m25 rubber seals inside and out. Float switch to stop the return pump. The other one to stop the feed pump. 16mm hose. Some T and X connectors. Anti syphon is a bit of air tube stuck in the hose 🤣
Perfectly as intended.
There's some control bucket for you to see lol