Hi Tryntje, You wrote: >since we have moved into this townhouse last August, I have not been able >to rid the fuzzies water bottles of green algae. Are you by any chance putting vitamin drops in the water? My vet advised me against doing that when I asked about the drops I had bought. He said that it promotes algae and bacterial growth - in other words, the drops are food for bacteria and algae. Algae will also grow in sunlight - does the sun hit the bottle sometime during the day in your new place? It sounds like you might need to get a new bottle. Refill with fresh water every couple of days. Rinse the bottle well before filling. Good luck- mama Gail [Posted in FML issue 2306]