I took a large cleaver and butchered this one....

This guy is a huge calling station but he always bets when I check to him and has been taking a lot of pots off me because I've been lagging it up. Every time he has called my cbets and bet the turn but he isn't really aggressive. He hasn't raised me yet and his turn bets have been pathetic. I haven't played back at him yet.

The other players in the hand scared me too but the table has been really loosening up since I joined in and my PFRs have been getting a lot of calls. There was a huge pot in front of me but I really felt like I couldn't call. Coming from this station, I think it was AJ, some other 2pair, or maybe even the gutshot...I just don't know exactly but I think even he would know to raise the flop if he hit a set. Maybe he played his 2pair passive because he was scared of a big pot with the other people still in it. Then again, his push says otherwise. I can't figure it out.

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $5/$10
6 players
Converter

Stack sizes:
Hero: $1082
UTG+1: $1236.75
CO: $1027.50
Button: $905.70
SB: $1068
BB: $1017

Pre-flop: (6 players) Hero is UTG with A K
Hero raises to $35, UTG+1 calls, CO folds, Button calls, SB folds, BB calls.

Flop: J A 7 ($145, 4 players)
BB checks, Hero bets $111, UTG+1 calls, Button calls, BB calls.

Turn: 8 ($589, 4 players)
BB checks, Hero bets $250, UTG+1 raises all-in $1090.75, 2 folds, Hero folds.
Uncalled bets: $840.75 returned to UTG+1.

Results:
Final pot: $1089

Which one is the fish?

If it's UTG+1, then I've left tables like this. Position is so important vs loose players.

Position is important, yeah, but if he's a huge calling station I'd stick around for sure. I'd much rather have a fishy calling station there than a good lagg. I think that 1 huge calling station at a 6-handed 1k NL table, can make it a good table, even if the other players are pretty decent and your position is bad. And in this spot, I would certainly fold, especially since you say he's not aggressive.