Originally Posted by TheJadeBetta
Usually I just pick one out and set them next to another Betta. That usually gets them to flare better than a mirror.
I agree! And I've noticed they flare quicker if you hold them next to one of their same color or a female.
Problem with LPS is that the fish can already see eachother so it's no novelty when you hold them close. It's better to go on shipment day or the day after,it's when you'll see the fish most active.
Ask someone at the store (or call like I did) when they get their bettas, it's usually one specific day a week.
I go almost every Friday to Petco to see the new fishies because they arrive on Thursday.