On Wed, 2 Jun 2004 00:12:18 +0100, nightjar wrote:

"wanderer" wrote in message
.. .

snip

Takes about an hour every other week during the season to vacuum the
pool,

I have a robot that cleans the bottom for about six hours each day and that
is not fully effective at keeping the pool clean.

Yup, that's why mine is never used. It cleans fine where it actually
passes, but I found the patterns of movement tended to be governed to a
large extent by the connecting hose, so some areas were rarely traversed
by the cleaner. Like I said, it takes me about an hour once a fortnight,
and the pool is nice and clean. The secret is not to let the sediment
settle and form into 'mud' that takes more aggresive action with the
vacuum head.