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.
1 Alternatively, you can add apple peels to the water in place of the acid. 2  If you prefer, you can use a gentle aluminum cleaner meant for cookware instead of the boiling method. 3  Use it as you would any soap or mild abrasive to clean flatware and pots. 4  Rub it on with a sponge, and then rinse it or wipe it off.