I have a 65L (17g) Tank I've had it abit over 3wks but lately all my Tetras have started schooling they go round like soldiers marching just below the surface. I have 7 Glowlites & 5 Silvertipped I'm starting panic because when they do this they won't eat normally there pretty good eaters I haven't had them long but I'm attached could someone tell me what to do? Also in the tank are 4 Brislenose Catties & 3 Platties the water Temp got upto to 30 thats about 86 I do regular water changes but I might the wrong mix!!