This DIY Kit will allow you to build a (1.5 x 1.5m pond) at 2 ft deep. Equating to a total of (1400) litres.
 
Pond kit Bio 1,400 litres -
Pond Dimensions: Length 1.5m; Width 1.5m; Depth 0.6m
Filter Kit: BioPress Set 6,000
Liner: Greenseal .75mm thick 3m x 3m
Underlay: 250 gsm (white)
Total Litres: 1,400 (Approx)
Max Stocking density: 14 x Goldfish or small Native species