The amount of water you should use in a bong will depend on the size of the bong and the strength of the hit you want to take. As a general rule of thumb, you should fill the bong with enough water so that the water level is about an inch above the bottom of the downstem (the piece that connects the bowl to the base of the bong). This will provide enough filtration to cool and smooth out the smoke, while still allowing you to take a strong hit.
It’s important to experiment with different water levels to find the one that works best for you and your bong. Some people prefer a stronger hit and will use less water, while others prefer a smoother hit and will use more water. Ultimately, the right amount of water for your bong will depend on your personal preference.
