I've noticed a lot of people have their water res. like 6 inches from the ceiling. Now two questions arise, 1. do you use a lid? and 2. How do you fill the res. that close to the ceiling, mine right now since I've just got a few small racks I just stand on a stool and fill with a bucket. But with plans to expand I will need to go higher and being a short 5'4" I don't know how else I could do it.