They are so funny that way! Mine have recently started refusing bloodworms. They're picky little murder beans. I have mine in a heavily planted 10 g. Oddly enough, we accidentally introduced neo shrimp to the tank and they couldn't care less about them. They eat the shrimplettes but leave the adults alone. Thinking about trying to add some Amano Shrimp for algae control so hopefully they'll ignore those as well. It's so interesting to learn about their different personalities. I'd love to see your setup! This isn't the best pic, but this is mine. I'm not sure if I love the floating PSO. It seems to be spreading algae across the tank more than anything, but I think the peas like the cover. They're more active since I added it.