I have three tanks (75 gal, 50 gal, 30 gal)....all with juvenile SA/CA Cichlids. For years, I've rotated and exchanged the fish based on their temperment, size, personality, and color. Of course, as these fish grow they need bigger tanks. I have been able to only keep one large oscar and one large ornate bichir, but I want to be able to keep more. I hope to find/build a 300 gal tank of so for cheap (this hobby is breaking my bank account). Can anyone help guide me in finding or building a large tank for cheap?