I just looked at RWT's wonderful, amazing home page...I've been looking for a resource like this, and feared that there wasn't one...thanks for the tips about feeding, and for the hard work you obviously do, to share your knowledge. I am wondering if there is any reason to have a heater in my GF tanks in case the furnace quits some day, or the electricity...as you can see, I am from Seattle, so we don't get too chilly around here...I just wondered. Of course, there are several fish outside in the pond, but they have been able to gradually get used to outside temps. Probably not necessary...just to stop feeding, as you suggested, should the temp fall below 50. And do appreciate the suggestion about a fan for hot weather! You do suggest vaccuming gravel in your website...am I getting confused? Or am I talking to a different person? Anyway, thanks.