My betta fish is a picky eater! I feed him brine shrimp every 2 days and he wont eat his other food now. I tried not giving him any brine shrimp so he will eat his other stuff but he wont it just sits at the top of the water but as soon as i put some brine shrimp in there its gone in less than a minute. If i just contine to feed him brine shrimp will he get all the nutrients he needs?