I have a 10 gallon tank with 2 plants and 5 guppies, a sunburst mickey mouse platy, and a peppered Cory catfish. I also have one black mystery snail. I have had a problem with unearth food and stuff on the bottom ever since my dwarf gourami died . I think if I get some nerite snails and/or ( recommend which option) ghost shrimp for my tank. I am curious whether the shrimp would harass the guppies... Petsmart's website says that when adult thy can harass other fish.