Frog Covered in Leeches: Copper Treatment, Manual Removal & Masoten

Frog on rockery with leeches on mouth, throat, eyes, leg — treat pond with copper-based medication (Masoten or malathion) to kill leeches systemically.

Immediate Frog Care

• If alive: Gently pull leeches with tweezers — but stress may kill frog.
• If critical: Humane euthanasia (clove oil).

Pond Treatment (Leeches Are Systemic)

1. Masoten (trichlorfon): Dose for lice/anchor worm — kills leeches.
2. Malathion: If available, dosed for parasites.
3. Copper-based: Effective but risky — kills invertebrates, plants, biofilter.

Leech Biology

• Feed → drop off → hide → return when hungry.
• Strong swimmers — find hosts across pond.
• Not host-specific — hit fish, frogs, turtles.

Warning

Copper/Masoten kills **beneficial invertebrates** (snails, shrimp, insect larvae) and **biofilter bacteria**. Use only if infestation severe. Remove frog first.

Leeches signal high organic load. Clean sludge, reduce feeding, improve filtration — long-term fix.