I found this device extremely fascinating. Couldn't find one to buy though. I don't know how viscous are these as the wave patterns seem to unaffected by gravit

I found this device extremely fascinating. Couldn't find one to buy though. I don't know how viscous are these as the wave patterns seem to unaffected by gravity. Original better quality video https://www.instagram.com/p/BJ3lrnpDohi/ https://www.instagram.com/p/BJ3lrnpDohi/ Invented by Paul Matisse to view fluid currents https://www.paulmatisse.com/history https://www.paulmatisse.com/history There are few more videos on youtube all very fascinating.