added 2 sexyshrimps 5 nass snails, got no fish, shrimps are MIA , ugh. curious so i got some shrimp i brought from the chinese market at 4.99 a pound, can i just chop some up and throw it in there, is there any precautions, tips , never fed my tank yet. tank ran since july 14* which is probably about 10 days old today