"Paul Enterline" wrote in message
om...
I have one of those "Drinkwell" water fountains for my two cats. The
water passes through a fiberglass/charcoal filter, then out a spout
into a dish, and is then recirculated. I have to add about quart of
water every three days.

Question: How long can I go without changing the water and the filter
and cleaning the unit?

I have a Drinkwell at work for the two office cats. I take it apart & clean
it once a week. At home, I have a Freshflow (?) for my two cats. I have to
clean that 2-3 times a week. Anything that falls into the water (fur, food,
bits of paper or whatever) just sits on the bottom of the bowl. I really
wish I had bought another Drinkwell.

Liz