I am trying to find a good way to get rid of my flatworm infestation. I was going to try flatworm exit, but its in a 2.5 nano. From my research, whe they died, so would everything else. Are there any other good ways to kill them. I am thinking of buying the smallest six line I can find, and putting him in there 2 days, then moving him to my 50g.(getting one anyways for the 50) but just thought I'd see if I could get any more options to get rid of these things, they are annoying. The water change way works, problem is I only change .5 gallons or so at a time....