I'm not sure if it's ever been brought up on this forum or not but here is an easy way to make a water level indicator. I put these on all of my bucket/nipple waterers but you could apply the same concept to just about anything. The nice thing about this is if you have a solid color bucket and you can't see the water level in it this makes it a whole lot easier. We all know how tight the lids for the buckets fit and can be a big pain to take off of the bucket when there is 45 lbs of weight dangling. This allows you to keep your lid locked down solid so no dust/dirt/feathers can get in and allows a quick visual to see your water level. One other thing, the black seal on the bucket is a special seal called a Uniseal, which is a very common type of seal for curved surfaces and they are made to fit all of your standard sizes of PVC. I usually have to order mine because I can't find locally. I get them from The Uniseal Warehouse. They are extremely cheap and work better than traditional bulkheads on curved surfaces. PS- On this particular bucket, I attached the upper zip-tie holding the tubing a little too far towards the top and it somewhat interferes with the lid. The lid still snaps down if you kind of pry the tubing. I just figured I would point that out so you don't make the same mistake if you decide to build one yourself. Also, don't forget to drill a hole in your bucket lid for an air vent. It can even be as tiny as 1/16".