Hydromancy is the form of water Scrying, as many may know it was been around for thousands of years. It is a very interesting a simple form of water Divination.
You do not require much to try it or anything, but knowledge that is and I would suggest you read some articles or texts on Scrying first before doing something like this. Normally a Diviner would go to a pond, lake, fountain, even fill water into a basin anything that contains water.
There are seven famous methods of how to do this; some are commonly identified by the famous Martin Anton Delrio. Though Im only going to show a few simple ones.
The first method consisted of: Suspending rings, or any type of chain over the bowl that is filled with the water, hanging over sort of like a pendulum, make sure when you swing it, its hitting the side of the bowl so it will cause the water to make small ripples. Therefore the Diviner whos reading these ripples could decipher it.
The Second method consisted of and this is my personal favorite:You'dhave to throw 2-3 pebbles into the water in which the diviner could see how the pebbles were decoding the message in the water.
Thank you for taking the time out to read this, if you'd like to add more methods feel free to.