We spent all day today cleaning out our aquarium! Bloodworms were starting to take over. We don’t know how they got in there, maybe in the roots of bought plants. I’m guessing they are food for tropical fish, but if you don’t have fish they multiply! Here is a photo I took a few weeks ago of one of them on a piece of wood in the aquarium. The other photo is one I took today, it is the bottom of a big saucepan with about 50 of them. We washed everything, especially the gravel, and found this many lurking in among the stones. Obviously these worms are flesh eaters, but we aren’t sure that they actually kill snails, but some of the snails have died lately and there is no other explanation. I just hope we got them all, or we will have to start looking for a fish that eats worms and not snails … a question for Quora.com I guess.