Hi
The profiLux system has most third party controller options available, you dont need to go buying any third party additional controllers or dosing pumps where all you will get is timed mode.
This is the beauty of ProfiLux its all in house so you get the maximum functionality with precise user interfaced software where no complicated programming is required, completely windows driven FREE software.
In regards to DIMMING The profiLux has everything built in already so other than a cheap interface you are good to go out of the box.
You require dimmable ballasts and a GHL interface.
There are two types of interface for 1-10V dimming. Either the PCB that also switches the power off to the ballast so you have no live ballasts when the control line is at 0volts
or there is the interface box which is nothing more than a wiring box with lead back to the profilux.
Whichever way if you want dimming control, GHL is for sure leaps ahead with options, same goes for dosing also, amongst many other items
For the stand alone 2 pumps they only just came back into stock so please call spenser at progressive reef and he will set you up.
Please let me know if I can help further