Caridina japonica je izvrstan cistac, ali ih moras imati dosta, mislim da ti je minimum minimuma 1 na 10 litara,....
evo ti misljenje s jednog sitea o kozici
"Enemy:
  
  In a well planted tank, there 
  would be no enemies at all, whether u have discus or Angelfish, other small 
  cichlids are no enemies. The only thing I can think are those cichlids from 
  Africa, but then, why putting Caridina japonica with them? Even big cichlids 
  like ciclasoma (south america) are too aggressive for them, but again why 
  putting south American cichlids in a planted aquarium?"