Why do I still look at my tankl level gauges?

I know people spend hundreds of dollars on monitoring systems and then pretty much ignore them. When you dump, it's often more determined by where you're at and when you're moving onto the next campsite. I know the black tank in my Dutch Star is good for 2.5 days and is full. So every two days, I just hit the electric drain switch and the black tank dumps. My grey is always empty as I have a bypass on my SaniCon. To be fair, my electric toilets have a ight that goes form yellow to red as the tank nears full.

I think people have a weird addiction to knowing exacty what's in their tanks, when it's not that big a deal. Often installing a SeeLevel or some other brand is a satisfying gadget installation.