Tried Windows 10 in Virtualbox under my Linux laptop and my laptop memory/processor are just not up to the job so running the GHL control center software is not an option for me unless I spend more money on a cheap laptop which just adds more cost to the Profilux as the laptop will only be used for the Profilux. Just been through the myGHL demo and it looks good. Is everything in the demo available today? If so, am I right in thinking from what you are saying above, I would need the software to calibrate the probes and update the firmware or are you saying calibration can be done through the keys on the base device (I will be buying the mega-set not the ultimate)? I can wait for the advanced programming to be available in myGHL as I dont need that for a while. From day one, I just want to monitor temp, pH, ORP and Salinity on my reef and shut off the heater if the temperature goes over a certain value.

Many thanks for your help.