The Oto's started out being very social, even sharing their bowl with the Albino Cory's. Things have changed in the last month, now they are shy and reclusive... seem to prefer eating after lights out. Supplementing has made all the difference in their survival, I haven't lost a one and they've grown to a full 2 inches. I slice and peel zucchini which seems to be the favourite food and top with an algae wafer. The slices freeze well individually in clear wrap to pull out when needed. Or blanch fresh in microwave for 1 minute in tank water.