bla287's video: Water on a speaker different frequencies Full HD

In the first part I placed a little "bowl" (actually the top of a CD box) filled with water and some dye on top of a speaker through which I ran sine waves of 25, 50, 100 and 150Hz (made in Audacity) which produces interesting patterns on the water surface! I didn't want to go to 200Hz or higher because already at 150Hz I had to crank up the volume much more for the same effect compared to 50Hz which worked best. In the second par I added some starch, I then had to place the "solution" directly into the speaker cone. I found that 25Hz worked best and I messed around a lot with the volume and starch concentration (adding more water, adding more starch...) but I didn't get the desired effects to stay and continue by themselves so I had to stir occasionally. (Filmed with a Panasonic HDC-TM700 @ 50fps progressive but converted to 25fps for Youtube, edited with Magix Video Deluxe 17, exported as lossless AVI then converted to mp4 with x264 --preset slow)