Most useful advice I can offer is: read the installation, operation and maintenance instructions thoroughly and follow 'em exactly. If you have questions the instructions don't answer, Vic Willman at Raritan can (don't talk to anyone else!)...talk to him before you try guessing.
If it's installed, operated and maintained according to directions, you'll love it!
An afterthought: Do your toilets use sea water or pressurized fresh water? If fresh water, the PuraSan would be a better choice than the Electro Scan.