Is there anything I can pour into a water heater that will dissolve mineral deposits and definitely not damage anything inside the tank? Hopefuly something that will work in a somewhat diluted solution since buying enough Lime-Away etc. to fill far enough to reach the lower element obviously isn't practical.
The tank is installed in such a way that once drained it would be simple to detach it and move it around so rinsing and draining several times shouldn't be too much of a hassle.
Thanks for all input.