I'm trying to use this recipe for cal/phos.. I think it works fast
1. Collect a bunch of eggshells and wash to remove inside filaments. Remember, you can also use bones and other good sources of calcium like seashells, clams and oysters, etc. Likewise, if you only want calcium, even limestone can be used, or simple lime.
2. Pan fry the eggshells. Fry until some are brown/black, some white. The burnt shells are your Calcium source while the white are the Phosphorus source.
3. After roasting the eggshells, grind them up. You can do it manually, with a mortar and pestle, throw them in a blender or electric coffee grinder, etc.
4. Add them to a jar and add 5 parts vinegar by volume. For example, if you have 1 cup ground shells, add 5 cups vinegar. The acid in the vinegar helps digest them. You will notice bubbling as this process converts the ingredients to liquid calcium phosphate.
5. Wait until tiny bubbles disappear
6. Seal the jar and ferment for 20 days.
7. Filter into another jar
8. Now you’ve made your own Calcium Phosphate
