The water is SO clear it almost looks as though the plants are floating in air.
I have taken a few pics to illustrate this since we are about to do the first flushing of the filters.
This pot looks as though it is floating in air! The whole thing is underwater and the new water lilly leaves are about 18 inches (sorry to those who prefer metric) underwater.
And the water lilly below is in the deep end of the pool. you can see the pebbles at about a meter depth and the bottom of the pool with old leaves on it is about 2 meters depth.
We are still struggling with duck weed which I am determined to eradicate. You can see the tiny green leaves caught on a floating leaf. At least I can see them now I have removed most of the floating plants.
The life in the pool continues in spite of the cool weather. The water lilies and lotus and the water chestnuts are dying back for winter and the plants are not growing so quickly. Surprisingly there are fresh frog egg masses and new tadpoles. There are also water dragon nymph cases on the plants - a different species which is much smaller than the ones we have seen before. Maybe it is the thinner, lighter, blue species we have seen flying about.
And thankfully the toads have stopped challenging our barrier.
There is barely any biofilm visible on the pool walls and on the rocks. However you can feel the slipperyness on the surfaces, so we know it is there.
The flushing of the filters involves turning the pumps off for a few days and then flushing them to waste. This kills the biofilm in the filters so the organisms let go and can be flushed out of the pool. The purpose is to clean the filters and also reduce the phosphates and other nutrients contained in the organisms. This reduces the nutrient load in the pool over all. The biofilm will start up again as soon as the pumps resume pushing the water through the filters. The biofilm elsewhere in the pool will repopulate the filters very quickly. I'll let you know how it goes. Ralf tells me that the water should remain clear.