If you are actually going to buy a tank then you should have a $ limit unless u r the richest person ever.For example, I know of a tank that took a year and $7,000,000 to make and install.(thats not even including fish, accessories, decor, ect!)
Thats a pic of an African Tiger Fish, not the South American vampire tetras.Some interesting fun fish are peacock eels. bichirs/polys, gars, rosboras, arrowanas, flowerhorns(u can train em), and last but not least a school of VAMPIRE TETRAS!!!View attachment 992707
Multiple full grown GATF and Goonch catfish