Figure 23. The cleaned portion of exposed floor. Proper care of this water source will require periodic cleaning of the entire reservoir floor, at times when the entire water supply is used up. 27 October, 2016. pic25 Sizes: 150 × 150 / 900 × 597 / 768 × 510 / 175 × 131 / 753 × 500 / 1,216 × 807