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.
The Cleaning Process: 1  Wash aluminum pan to remove any dirt and dry. 2  Mix 1 tablespoon cream of tartar, vinegar or lemon juice with one quart of water. 3  Place on the stove over medium heat until the water comes to a simmer.  If you have any aluminum serving utensils, place those in the pan as 1  well. Boil for 10 minutes or until the discoloration is gone.