i brought the oscar's back to the fish store as donation..but before i did i put them back in the red devil tank for a minute...wow the tables have turned!!! ... this guy is crazy taking on two @ a time..trying to go straight for the eye balls ....even attacking the vacuum gravel when doing water changes now..nothing like my piranha's.....and it turns out he is a she...small eggs all over the dirftwood and on the slate.....was thinking maybe i should get a male? but i decided not i heard they are picky mates + i wont know what to do with all the babies...