As previous : Just back from holiday in Italy. We stayed on a campsite
which I was highly impressed with. It was full of Germans but the bright
side of that was the quality and efficiency of everything - we suspect it
may have been German owned.

We stayed in a chalet and it had a gas supply and the hot water for the
shower and taps was supplied from a combi. Loved the constancy of the
temperature and instant hot water and the fact you could fill the kettle
with hot water which speeds up coffee making. I know combis are debated a
lot and we are keen to swop to them at home and this experience just
reinforced that.

Came back to our crappy electric shower and water tank and the first thing I
noticed was when I went to brush my teeth the water was stinking. I have
long feared what bugs lurk in the water tank. Sent hubby to look in the tank
for dead things but he couldn't see any. We ran the water full blast for an
hour and it improved but the next morning it was manky again.

Is there any miracle thing I could put in to dissolve the murk at the bottom
and make it like sparkly new instead of something that could preserve oak
for 10000 years?