What do you guys think about this line?

I checked the flop because I couldn't see him calling with much, and I called the 3bet on the turn because I wanted to let him keep bluffing and/or think his hand was the strongest. The river was bad because the full house got there, and he could also still have Axdd.

Should I have done anything differently? Villain was 40/30 after 30 hands.

Stacks:
UTG - UTG ($25.55)
BTN - Hero ($34.13)
SB - SB ($28.04)
BB - BB ($27.46)

Preflop: ($0.35, 4 players) Hero is BTN with T Q
1 fold, Hero raises to $0.55, 1 fold, BB calls $0.30

Flop: K 7 5 ($1.20, 2 players)
BB checks, Hero checks

Turn: Q ($1.20, 2 players)
BB bets $0.75, Hero raises to $2.07, BB raises to $6.00, Hero calls $3.93

River: K ($13.20, 2 players)
BB raises to $20.91 (all-in), Hero calls $20.91

I'd probably bet the flop anyway and hope he plays back or calls down.

I like how you played the turn. I think you could consider 4-betting to like $12ish, but that is player/gameflow dependent. Most of the time I like a call because it keeps bluffs in.

River sucks for you, but I actually don't mind the call since he is playing so many hands. Given that you checked the flop, he may be over valuing a weaker flush, going crazy with Ax, or just going crazy with some other hand.

I'd be much more inclined to c/ flop with the nut flush since now you block his Ad hands that will continue

I would start with a 1/3p cb

as played, let him barrel turns and rivers with his bluffs, you can go for value otr

if he's a mad fish then yeah sure I'm calling the shove

bet flop, you have good hand

checking flop to raise turn such small sizing tells me that you really should be betting the flop...

fwiw, pio checks flop with small flushes as opposed to what is mentionned in the above post. And when it does x flop, it raise turn more than 3x, representing flushes balanced with naked Adxx combinations.

How is Q high flush a low flush and how you can justify checking flushes at these stakes?

I would very very rarely check flushes otf at micros. That doesnt mean you shouldnt wanna hear the optimal part of the story. Plenty of times gto/explo will tell you to do the same thing.

imo its important to understand gto in order to fully deviate and use correct explo strat.

fwiw, some 10z/25z regs would realise that checking flop removes flushes from your range thus significantly increasing the ev of checking flop.

I agree that it's crucial to understand theoretically sound play.

bet flop 3/4

Always fastplay everything at the micros vs everyone because people wont exploit you for not slowplaying but are super inclined to call you down too light.

I'm always betting the flop and I typically go small on monotone boards, so that that worse hands can call when I have the flush, I set myself a cheap price when I'm drawing (e.g. with the bare Qd), and I can get away with incredibly cheap bluffs (that actually work) with total air.
Checking back the second nuts makes no sense at all, and is roughly equivalent to checking back middle set on a random board. Don't do that. Get your value.

As played, you probably shouldn't raise the turn if villain is likely to keep bluffing (or v-betting with worse), but now you have a perfect opportunity to shove the turn and stack villain's sets and KQ, while charging him the most if he has the bare Ad. If he somehow flopped the nut flush you'd go broke on most rivers anyway.

You might have to fold to that river jam when the board paired. Because there was no flop action, villain's range is not well defined. He can definitely have boats and nut flushes, but might be overplaying weaker flushes, or even think that trips are good, because of your passive line.