Searching For High Ql Water/Clay

[Shask]

Let's say I'm walking alongside a river, digging and using a waterskin to test for high ql clay or water. How far spaced apart should the tests be? (obviously you start searching more intensively when you hit a higher than normal quality)

[Neptjunoue]

One mini map is what I normally use. If any node falls between that then it is because the node is not very high quality. Anything lower than a mini map would slow me down and make it more boring than it is.