When a Fish Raises

I'm trying to figure out if I should be three betting fish for value more often when they raise preflop. Let's say I'm on a six-max table and someone running stupid loose VPIP but low PFR (like 50/13 or something like that) raises ahead of me. Are they randomly raising with their whole range there? I know if their PFR is really low they are probably raising big pairs, AK, and AQ, and the like. (Like if they're 30/1 they're only raising aces and kings). Notes help with this and I'm trying to take more notes when I play, but if I have no specific reads outside of the HUD I give their raises a lot of respect. Too much respect, I think.

3bet aggrofish (50/13s) for value much wider than you would passivefish(30/1s). They tend not to fold to 3bets -- often their opening range is near identical to their calling range, so the wider they're opening, the wider you can 3bet them profitably.

if the dude is 50/13, especially if you're IP you should be 3betting like AJ+, KQs, 88 or 99+ for value.

f he's 30/1 I wouldn't 3bet anything other than AA or KK

way to generalized but a good starting point methinks.

Thanks, pretty much what I thought.