"Geezer From The Freezer" wrote in message
...
yep deinitely planaria. I had this (and still do a little) in my
10gallon tank. Toni's advice is good. If you have any plants in the
tank, remove them and give them a damn good wash. Also wipe the insides
of the tank and then do a huge water removal.

If you can move all your fish out of the tank into another, you
could always try raising the temperature to about 105degrees F for
a day or so as this will kill the little gits too. Unfortunately for
me, this wasn't an option, and I still see the odd wriggly planaria worm
in the tank. They are harmless but if you have LOADS they can get into
the fish's gills and irritate them.

I've never had to do anything this drastic in any tank, all I do is reduce
feeding for a week or 2, and the fish eat them. I have done this a dozen
plus times over the years, the most drastic thing I've done is an extra
gravel vac.