This is water soluble suminagashi ink in water. I use this ink because of the very reason these images sometimes get constructive criticism about focus. That is that the ink is dissolving rapidly into the water and therefore has a soft, ephemeral and surreal look. The inks are dropped in at different rates and through an oil barrier which provides some control. Then I flip the final image to be 'trees'. Enjoy!
I have been on a diving expedition in the Arctic part of Finland. We took a lot of samples of algae and other living material from the rivers. Later, when I put the plants in a glass bowl and look at the algae through a microscope, I get almost the same results as in your photograph. Yes, it looks absolutely fantastic! Good work!