Just to warn that the " 2/3 ...

Just to warn that the " 2/3 of the area" rule for the floating plants should be taken with a bit of caution as it depends on a few factors such as the depth of the pond, weather conditions etc. In the hot climate areas in AUS we typically not use permanent/floating plants more than 1/5 - 1/4 of the area, especially in the shallow ponds. With 2/3 of the pond covered by the weeds (either permanent or floating) - I would call such a pond - a wetland. Happy to be corrected on this. Regards, Iouri