I have an oil-fired water heater that collects mineral deposits from our hard water. It's driving me nuts - bits of the
stuff keep coming off and clogging aerators, shower heads, etc. Also makes a mess when the tub is used. However when I
drain the tank almost nothing comes out - seems the deposits are pretty well attached!

I'm wondering if it's possible to use Lime-Away or CLR to remove these deposits, or would this damage the tank? I drained
the tank, removed the drain valve, and looked inside - it seems the layer of deposits is pretty thin, 1/8 or maybe 1/4 of an
inch.

Eric Law