$25NL 6max is pretty fishy, but one thing you need to do is: if you recognise 2 or more decent players at a table, leave and find a fishier one. You don't want to be battling to break even against half the field, and sharing fishing duties with other good players. There are plenty of tables where none of the players have any real clue - find one of them instead.

Actually, identifying other players of quality is a vital factor at 6max - the fish can be beaten playing ABC poker but you need to know whether the better players are nitty, laggy, maniacal or whatever so you can adjust your game accordingly.