have three angels now all about and inch long(not tall) and ive had them for two almost three days now and they wont eat. i'm not too worried because they are relatively new, but i have to do something soon. could it be that they are small and cant see the food at the top of the water? i have a 30 gallon 16inch tall. is this too tall for their size? there was also a lot of surface commotion because i have a 55 gal filter and a 40g aerator, so i shut the aerator off but they are still not eating. any suggestions?