這是樸門老師 Tom Ward 介紹過的防水布，但是價格不菲（露天拍賣）！把資訊留下，以備不時之需。
MONO INDUSTRIES – Manufacturer, Distributor & Supplier of HDPE Pond Sheets based in New Delhi, India
Source: HDPE Pond Sheets – HDPE Pond Sheets Manufacturer, Distributor & Supplier, New Delhi, India