Thank you. I am not really having trouble with building on/under the water, but having a builders block so to speak. I have viewed hundrends of pictures on the web that are really good, but nothing farm/water surface related. There really isn't anything farm like for that mater except how to automate vanilla farms, etc. Was just try to get some inspiration.
I am by no means an artistic builder; I just want it to work and multi-level rectangles are doing an awesome job. However, how about drawing a flower-like structure when viewed from above? With the stems being access paths (out of the material of your choice) and every flower being arranged from plantable dirt with different colored plants to build interesting patterns when viewed from a distance with an outer contour made from the same material as your access path?