I just got some algae wafers for my nerite snails since they seem to have eaten all of my algae and don't have much to feed on. After the algae wafers softened up, my betta started to nibble at it. I just fed her, and I'm worried that her trying to eat the algae wafer will stress her out, since bettas get stressed when there's too much for them to eat. She obviously thinks that this is for her. She even spits most of it back out, but she's trying to force herself to eat the algae bits. How can I stop her?