I'm just gonna take a stab at this to get some sort of discussion going, I'm still at $10 so keep that in mind

wouldn't the made flush on the turn be a good place to check? nothing like betting a scare card to get villain to fold... if he has a set, he almost has to bet there right? c/push turn and don't worry if they hit their boat, or feel free to bet harder on the river if they check behind.

as played I'd probably do something closer to pot size ~$14 or so, seems like anything less and you're just asking for somebody to push

I'm probably missing something but thats my early assessment