The equator demonstrations are a well known tourist attraction scam. They pour it in on the side of the tub they want it to spin in. The flow also has to do with the shape of the drain, and there is also a phenomenon where the water even changes the direction of spin mid flow.
Mainstream science was briefly fascinated with professional laboratory experiments of the Coriolis Effect on the spin of water drains at one point, but I have read that the results were inconclusive. One or two researchers claimed that they saw some consistent results, but their results were unable to be replicated, and there was discussion of systemic error due to drain shape or external elements. I even recall reading some reports of the researchers claiming that the wind hitting the laboratory was affecting the experiments. Reports of those water drain experiments seem tough to find at the moment, however. Once the Round Earth experiments start failing, the papers are left to rot somewhere, are not linked or referenced or shared, and they pretend it never happened.
Here is our current article on the matter of the Coriolis Effect:
https://wiki.tfes.org/The_Coriolis_EffectFrom the talk page:
Topics for Further Research
In response to a video embedded in the Snopes link, showing the rotation of water in a 5 foot diameter pool which supposedly shows the Coriolis Effect in action, we are given a lead for further research by Rand Huso:
“ This has been done before - I saw the experiment done in the '80s. The Coriolis is so small that small perturbations in the construction of the drain could easily be amplified and become much larger than the Coriolis. The proper way to conduct this test is to repeat it many times and take the exact environment "down under" and do the same thing. As I recall, the earlier experiment was repeated 100 times, and the numbers were 49 to 51 - completely inconclusive. ”
“ the experiment has been done before. I love this presentation, but I'm unconvinced at their conclusion. What I saw before was in the Meteorology department at TAMU. Film. ”
It would be nice to find documentation of the professional experiments. I only wish I had saved what I found about the researchers claiming that the wind hitting the outside of the laboratory was affecting their controlled pool experiments.