I have a pleco that is about 2 1/2 inches and a few glofish, a platy, and a tetra. The pleco loves eating the zucchini algea waters but a large, greedy glofish is always nipping at him because for some reason my glofish loves eating the wafer and the pleco still doesn't defend himself. Is it normal for non bottom-feeding fish to eat algea wafers? And my platy is always chasing the greedy glofish, aggravating him.