Great white sharks. Trophic Pyramid Information that is in video: An ecological pyramid (also trophic pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or biomass productivity at each trophic level in a given ecosystem.
The risk is that you may not be able to remove all the acid and if it is left on the metal it will continue to corrode the metal. So to give you a quick answer, you can use vinegar to etch the aluminum, but you have to rinse the surface thoroughly to remove all the acid residue.
Rinse the aluminum in hot water, and remove your gloves. Remove the oxidation If the aluminum object is a cooking vessel, put it on a stove over medium-high heat. Otherwise, set a large pot on the stove, and set the aluminum object in it. Fill the vessel halfway with water. Add 2 tablespoons white vinegar, 2 tablespoons cream of tartar and 2 tablespoons fresh lemon juice.