I have a vieja tank. The smallest fish is 7-8 cm (~3") hartwegi the biggest one is 20 cm (~8") argentea.I want to buy a 7-8 cm (~3") jardini. In the future, can jardini attack them? Or when the jardini can be a hunter?
and do use the search option.. there have been numerous threads on the same topic.. i don't own a jar.. but the basic thing i've got from all these threads is they become aggressive after they hit 12".. your viejas will anyday be in trouble after that point... a smaller jar.. not too sure but could be aggressive too.. but there also have been exceptions of mellow jars..so have a thorough read before you buy.. all the best.. cheers.