We found some years old food at my girlfriends house and it is Topfin Freeze Dried Medley. Its a mixture of freeze dried bloodworms and some other stuff and some tiny tiny freeze dried shrimp. The fish seemed to like it so we used it a good bit in her ten gallon. I used it about two or three times in my 5 gallon and then noticed what seemed to be planaria. I quickly stopped using it and vacuumed gravel and all. There were only a couple of the miniscule worms. So my tank is fine. But her ten gallon is loaded with them and it has only been set up for about 1 or 2 months. Gravel is clean and vacuumed, no overfeeding. Could it be possible to get planaria from the very old freeze dried food?