@this_is_me
What do you all control with ur profilux now? Are u doing ato or awc?
Temperture: Heater and Fan
Lights: I used to run pretty fancy LEDs(Pacific sun Black Python XM) with dimmable sunrise/sunset, high noon, lightning, moonlight, etc. But now just ON/OFF at certain times with my MH and T5s. LEDs didn't work out for my tank. Light is temperature dependent and will turn off when temperature is too high
Circulation: Beside my return pump with the option of turning if off when the level sensor on the main tank is trigger(overflow detection), I control my Tunze 6055.
Skimmer: Turns on after 2minutes when there's a black off or lost of power. This avoid the skimmer to overflow because the water line is high. When you lose power, water from the main tank flow down via the drain and now your water line in the sump is really high. If the skimmer turns on at the moment you get power back, it will overflow. The 2minutes delay will give time for the water line to settle.
Dosing: I have 4 pump profilux doser to dose CA, ALK, MAG
ATO: The remaining dosing pump is used for ATO with two level sensors. One sensor is to turn the ATO pump when water is not detected and turn off pump after the water hits the sensor. The other sensor is a safety. If water hits the second sensor, alarm will go off and email sent, and ATO pump shuts off.
Alarm and Email: Every time the alarm is triggered, an email will be sent. Temperature too high. PH too low or high, Conductivity too low or high, etc.
Those are the things I have off the top of my head at the moment. I'm sure there's more that I set up. The goal is to have a fail-safe system.