NT LABS Argusol 500ml Parasite Argulus Anchor Worm Treatment Koi Pond Fish
Argulus ), anchor worm (. 500ml treats 4000 UK gallons/ 18200 litres. Suitable for koi only. Shake the bottle well before use. Treats fish lice (. When fish have large external parasites. Test your water quality using Pondlab Test Kits. ).