Am I underfeeding my female BN Pleco? I give her 1/2 of a sera spirulina tablet every other day. I put the tab in front of her and she quickly gobbles it up. I target feed her and make sure the cardinal tetra in the tank with her don't steal it. She always finishes it in under a minute, does that mean she is still hungry? I will post a pic of the size of tablet and a pic of her.