when i first tried putting my 12" (at the time) silver aro in with my gar they nearly had her killed in less than a day. luckily i got home in time to remove the aro and setup a good hospital tank. gar do seem to favor silver fish. at least in my experience.
the gars were w the hujetas since they were a little less than 2 inches up til they reached 6 inches.
but one died.
te remaining gar was moved to live w the aro and was fine w the aro til it hit 12 inches then i moved it to the pond.
it also lived w a CK and still is in the pond.