the worst bet sizing is preflop imo
you could pot the turn but the difference is not great and you do get a few more folds by potting it exactly
but $1.5 probably makes you 15 cents more on average (maybe like 2-3% more folds?) and 30 cents more on the river if he calls river

$1.6 is probably exactly pot and probably still makes you 15 cents more on average (we assume slightly more folds), but 50 more cents on the river if he calls river

so maybe potting the turn is better yet


it heavily depends on whether the guy is a reg and doesn't like getting potted twice and will fold a marginal ace because of your strong bet sizing
but obviously you should already have a read that this guy is a fish since he's OPEN LIMPING