Jestersix

DIY Neptune Apex Display Module + Dosing Calculator

As someone with two reef pis, the UI sucks, and unless you're a hardware & software nerd, it's not really a good solution. If you're both of those, it has some interesting characteristics.

It's just a web UI though, so you can use any device/tablet to connect to it. An old phone is a good option.

For the things you listed though, it can do those, but requires some hardware work. UI still sucks though :)

Also be aware salinity probes and the circuits are pretty expensive, if I remember correctly over $100. pH probes are like $50. To connect them to a pi you need a custom circuit. The robotank site has the circuit for around $35, but you might need 1 for each of orp/salinity/pH.

Based on my experience, if I was starting over and not looking to diy a bunch, I'd try an old phone and a lower model hydros or apex.
 
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