Thinly peel the citrus using a Y peeler or a vegetable peeler, leaving the pith behind. Weigh the peels in a small jar or tupperware placed on a kitchen scale, set units to grams.
With the total weight of the peels now determined and written down, multiply this number by the ratios in the chart below. For lemons, no math is required, you will only add citric acid equal to the weight of the lemon peels.
Reset scale and add the appropriate amounts of acids to the peels, then tighten the lid. Shake jar to evenly disperse the acids among the peels, and let it sit for 1-2 hours, shaking occasionally. During this time, the acids will extract the essential oils from the peels, and will make a slurry.
Transfer the slurry (oleo citrate) to a large, wide-mouthed quart-sized jar. Place on the scale and tare the scale to zero. Add water, at 16.66x the original weight of the peels. Use some of the water to rinse out the remaining acids in the small jar, then add it to the large jar along with the remaining water.
Juice the now-peeled citrus fruit and add it to the large jar (no need to weigh it). Fasten jar lid and shake thoroughly to combine, then set aside for 30 minutes to steep the peels and extract every ounce of flavor.
Filter mixture through a fine mesh strainer or cheesecloth to remove peels, along with any pulp or seeds you may have missed when juicing. Pour super juice through a funnel and into a glass bottle. Label with the type of super juice and the date, then store in the refrigerator for up to one month.