my regular gold fish are about 5 inches long, my black moor is 2 and 1/2 inches long, my regular goldfish are not very competitive, but at feeding time they tend to be very fast with going up to the tank and grabbing the food, when they turn to go back down, their tail splash out alot of water, im afraid when they do that they might hit the black moor, also how clean does my tank have to be for the black moor?
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