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 Place the same ceramic mug used in the first vinegar rinse on the drip tray. 2  Do not use a K-Cup.  If using a mini model, lower the brewer handle 5 seconds after adding 10 oz (300 ml) of white vinegar to the water reservoir. Press the Brew button, and power the machine down once it starts to dispense the vinegar.