DjTommy skrev:

"Världens elakaste sötvattensfisk", hur menar du då?

Not compatible with other fishes due to its nasty disposition. Many claim that H. wyckioides is the most aggressive freshwater fish in the world. Given this fish's ability to bite, it is not even safe with tank mates too large to swallow since it will simply take bites out them.

All filters, heaters, etc should be behind a protective barrier as this fish can, and will, bite through a heater.