What is a good test for glowing water?

Glowing water is typically caused by the presence of bioluminescent organisms, such as dinoflagellates or bacteria. To test for glowing water, you can collect a sample of the water and observe it in a dark room. If the water glows, it is likely due to the presence of bioluminescent organisms. You can also use a spectrometer to measure the wavelength of the light emitted by the water. This can help you identify the specific type of bioluminescent organism that is present.