Add pomegranate seeds with 1 cup water to the blender. Pulse for 5-10 seconds or just until the juice starts separating from the seeds. Do NOT pulse for too long as the seeds may start to break down.
Pour the juice through a strainer. Using the back of a spoon gently press the seeds down so all the juice is separated from the seeds.
Add more water or seltzer water to the strained juice. Note: If you are going to add the pomegranate juice in cocktails or mocktails you may want to skip this step.
Add a pinch of salt and sugar. Mix well. Serve chilled.