Rotten Pond Plants: Smell = Anaerobic, Clean Out & Aerate

Inherited pond, water lily smelled bad this spring, foam present. Bad smell = anaerobic decay. Plants rotting from lack of O₂.

Emergency Cleanout

1. Remove all plants — inspect roots. Black/mushy = dead.
2. Drain max water — vacuum sludge.
3. Fish to holding tank — aerated.
4. Clean liner, rocks — no chemicals.
5. Refill, dechlorinate, add bacteria.
6. Replant healthy divisions in aquatic baskets.

Root Cause

• No filter/waterfall = no circulation = anaerobic bottom.
• Plants suffocate in muck → rot → smell → foam.

Fix: Add Flow

• Pump + waterfall or filter return — 24/7.
• Aeration = life.

Healthy pond doesn't smell. Clean the rot. Add the flow. Plants will thrive.