hello!! i have a 15 gallon fish tank and i use a top filter......is that alright for a 15 gallon tank......the woman from the pet store said that its made exactly for a 15 gallon tank....but is it alright??
My parrotfish are always fighting.......there were 3 of them but the other one died...the other one got blind.....i don't know why but they're always fighting..........so we separated them.....is it normal for cichlids to be aggressive?