you say you have
1 pleco
1 red tailed shark
6 tiger barbs
in your signature it says
6 tiger barbs
1 red tailed shark
1 HILL STREAM LOACH
if it is a pleco its that you should re-home (unless its one of the smaller species like the clown plec)
if its a hill stream loach it should be ok, except they like cooler water.
assuming its a hill stream loach, if you was just leaving your tank as it is, with no more additions you would be fine.
is there a reason you would want to re home the rtbs? they are territorial fish, if it is harassing others then maybe, yes you should re-home it.
Dave