Hi. I have just upgraded from a 30 to a 95 litre tank. I have mainly tetras (neon, harlequin and zebra), 3 mollIes, 2 guppies, 4 platties. firstly I want to know if I can have some more fish in it. But my main problem is that the last 2 days I have lost 3 fish, due to having their tails chewed...