Proposed setup

[TimT]

Hi,

I have done the following with Profi's for a few customers:

1 floater level sensor for high water alarm. Can send an email and shut off the UV in case of return pump failure.
1 opto level sensor for level control via ATO. ATO will require the dosing pump or some means of pumping water from ATO container to sump. Tunze makes a system for doing that. If you buy the 4 channel dosing pump then you can dose 3 part Balling and do ATO.

If you opt for the ex option you can have a 3rd level sensor of the opto style that can send an alarm if the water level drops too low... failed ATO, flooding skimmer, leaking TLF reactor etc.

If you want to control reactor pH then you will need an add on pH card and probe for the reactor outlet. Profi can control CO2 solenoid to allow CO2 into reactor via needle valve when it's pH is too high.

Make sure to get the GHL probes.

Cheers,
Tim