I am looking at the blumats watering system with using a 5 gallon bucket for the reservoir for it. What do you recommend to view the water level in the reservoir? The blumats from what I read people often put the reservoir a few feet up and I may not be able to look down into the reservoir to see the water level so it would be nice to have a way to know how much water is in it to pump water up to it. I do not really want to drill more holes in the bottom of the bucket below the water line than I need to on there for it.