i picked up a couple otos to eat the algae in my planted tank. they ate all the brown algae, and munched some zucchini (blanched) when that ran out. i added more light, and now i have green algae. they wont eat the green algae, and now they wont eat the zucchini, but my goldfish are loving it. that still leaves me with an algae problem, and a non eating oto problem. reccomendations?