I have a 10 Gallon currently housing 2 mini lobsters, 1 Mystery Snail, 2 yellow german guppies, & 3 Blue neon guppies. The neon guppies were added yesterday afternoon (5:00pm). All looked fine & healthy. Tonight I got home from work (930pm) & one of my blue neon guppies tail looks like this! What is it? What can I do to help him? ![IMG_1025.jpg IMG_1025.jpg](https://www.aquariumadvice.com/data/attachments/268/268190-6b1342236a3a5218180aaa0e3f3cedbc.jpg)
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