My main adjustment is simple:
bluff less, value bet more. Loose-passive players call too much and rarely fold, which makes bluffing against them a losing strategy. There's no point firing three barrels as a bluff against someone who's going to call you down with bottom pair. Against these players, every bet should have a clear value reason behind it.
The other big adjustment is sizing. Against calling stations, I tend to bet bigger with my strong
hands because they'll call anyway. At micro stakes a lot of players use the same small sizing regardless of hand strength, which leaves a lot of value on the table against players who never fold.
I also try to be more patient and wait for stronger hands before getting involved in big pots. Against a loose-passive player, I don't need to manufacture action — they'll give it to me naturally. So I can afford to be selective and only play big pots when I have a real hand.
The frustrating part is when they hit their draws by calling with anything and beat your strong hand.