This extended pool seems to flow out of the house, its reflective surface echoing the shine on the interior floor. The pebble floor of this pond gives extra texture to the design, yet a pure black reflective surface could have been achieved with black pond dye added to the water. This also would have the benefit of blocking light, which would help prevent the growth of algae and keep the pond in the spotless state demanded of minimalist design.Any water feature used in minimalist designs must be perfect in construction and maintenance, and care must taken with water levels, pond hygiene and even the disguising of any pond lining.