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Reviving an Old Concrete Goldfish Pond

6x11 ft, 18" deep concrete pond, dry 1 week after cattail removal. No filter, aeration, drainage. Asks how to fill, stock, and plant.

Volume & Stocking

~740 gal, 66 sq ft surface. Rule: 1" fish per sq ft → ~66" total fish length.

Equipment

Buy pump/filter rated for ~750 gal at garden center.

Plants

  • Hardy water lily, lotus.
  • Marginals: horsetail, sagittaria, water iris, dwarf cattail.

Depth & Winter

18" okay unless in northern 1/3 of US or mountains (then 24"+ safer). Barley straw for string algae.

Resource: UIUC Water Garden.

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