Arduino based ph and nutrition automation

Hey there :wave:
I‘m curious if anyone in here has some experience with arduino, ph/ec probes and automating this?
I‘m a not proud owner of a grobo and want to rework it. (I bet their source code is not open source).
So I looked into hydroponics automations with arduino and raspberry pi.
The ideas for the electrical parts I took from here:

Waiting for the parts to get my hands dirty. :hammer_and_wrench: