Have you people got no sense of proportion?!
You would really keep a
+ 30cm (even up 35cm) fish in 30 cm wide tank? I mean what the hell is your major malfunction?? He wouldn't be even able to turn around!!
55 gal? Not even
close enough, they are
schooling fish which in wild live in schools of thousands!
And yes, they will eat each other when
treated bad. Here's all the errors you can make: too few, too small tank, wrong nutrition, wrong conditions. They act bad because they are treated bad and stressed, unable to carry out their natural behaviour (such as swimming
).
They are
big, strong swimmers and messy. I mean, 55 gal!?
You would be drowning in #### in couple of days. They eat a lot, they poo a lot, ok? When fish poo a lot, the water gets bad soon, ok? When the tank is small, it gets bad even quicker, ok?
250 gal. is an absolute minumum for a school of 6 individuals.