""Maybe can try shaping the wet cement onto the PVC pipings and coating then with a layer of grade 1 sand, therefore creating texture and shapes that are more naturally looking.... """
why dont we mix the grade 1 and 0 sand with PVA glue to form a sand paste den coat to the piping from there layer by layer we can form any shape we like etc caves overhanging rocks
do u think i will works??? the problem is that i scare the wave that we create will create erosion on the sand paste