any thing can be done to try to keep water clear some even work where this one will be in a year remains to be seen. Not my work but concerned interestfor the ownere and the fish area of filter farm 625 sq ft best guese 20,00 gal pond moderate stock rate no supplimental airation just 10,000 gph waterfall. can't see em but there are two pumps in the farm area.
http://f1.pg.photos.yahoo.com/ph/mik...m=DSCN0215.jpg