I bought 3 ghost shrimp on saturday, and it looks like they all have clear/white feces. Im guessing the feces are supposed to be brown, and that the colour they have could be an indicator of a bacterial infection or parasites like it can be in fish. Today I recieved some duckweed from a member here, and I stupidly put my fingers in the water (this is just a 10 gallon with the 3 ghost shrimp) to get it off, and then put my fingers back in the rest of the duckweed to get more. I wanted to put some in my 20 gallon too, but I dont want to risk the chance of introducing parasites (if thats what it is) into the aquarium. What can I do to make the remaining duckweed "safe"? Ive heard that the product "life bearer" is good to disinfect plants, but Ive never seen it locally.