yup, it's connected through the arduino. It's outputting to the serial window for now.
Ultimately this application would work better as part of the DIY controller yes?
DIY Aquarium Touchscreen Controller
It'll be more efficient as a group of devices with a single controller. You can tell the solenoid to turn off at a certain ppm and on at etc....
The settings would be unique to each tank I think.
But for now I'm building as a single app for testing purposes.
I'll have to find a way to build a better casing. I'm worried the drop in ppm is due to air leaking.