hi well heres my story a couple if years ago i had bought myself a red devil, oscar, jd and a blood parrot there were all in my 33 gallon until they eventually outgrew it so i put them in a 180 gallon aqaurium,but recently ive noticed my red devils been attacking all my fish so ive put her back in the 33 gallon, shes 9 inches and about 5 years old. shes alone in the aqaurium, and seems to be alright,will she live in the 33 gallon if i keep her water very clean? im going through a hard time with money right now. and i really love this red devil, any tips please?