Clear Worms in Filter & on Pond Bottom: Snail Eggs

Pond, 10 fish. Filter clogs with clear "glue." Bottom has 3" clear worms. Photo sent. Asks ID.

ID: Lymnaea stagnalis (Great Pond Snail) Egg Masses

Clear, gelatinous strings with white embryos. Stick to liner, plants, filter. Not worms—egg capsules.

Snail Pros/Cons

• Pros: Eat algae, detritus.
• Cons: Multiply fast, clog filters, leave pond, host parasites.

Management

• Remove egg masses manually.
• Trap adults (lettuce leaf overnight).
• Assess if benefits outweigh hassles.

Most snail eggs don't look like this—distinctive to Lymnaea.