Just make sure you shut off the water and electicity to be safe. let it cool release the preasure, may as well drain the tank and clean it out sametime too, i think a wrench or socket will get it out. If I recall, once it's out, you can just saw it off? Why do you want to take it out. We have well water and those rods make the water smell like rotten eggs, we take them out so the water don't stink.. is that your case?
Make sure you refill the tank before turning the electric bank on..