Just flushed hot water heater, still a bit discolored?

Four days ago I flushed out my hot water heater because the water was very dirty. The result was a vast improvement. However it still isn't crystal clear; it has a slight dirty greenish tint. Is there anything else I can do to get rid of that last 0.1%?

Originally, I emptied the tank completely, then after refilling I ran the hot water from a bath tub and sink for 10 minutes. A day later I ran the hot from four sinks, a bath tub and a shower for 30 minutes.