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Finding a Leak in a Figure-8 Pond: Damming Sock at the Narrows

Isolate the Sections

Use a "damming sock" (spill containment tube) from a safety supply store. Place at the narrow connection, weight it down. This stops water transfer so you can monitor each lobe's level independently.

Then

Watch which side drops. That side has the leak. Repair with EPDM patch kit.

Pond and Water Gardening: Quarantining a New Goldfish for a Pond; Fish Die-Off After Algaecide Treatment: Emergency Response; Overwintering Pond Goldfish: When to Bring Them Inside; Stocking a Natural 30-ft Pond for Bug Control; New Preformed Pond: Goldfish Dying in Hours; Pond Volume & Pump Size Calculator; Fish Kill After Tadpole Hatch: Oxygen Crash; WD-40 Contamination in a 150-Gallon Pond: Emergency Response; Goldfish Lying on Side in 1,200-Gal Pond: Sickness or Old Age?; Stocking a California Pond with Lake Fish: Compatibility and Mosquito Control

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