Nematodes (roundworms) in particular are well-controlled by this treatment. Nematodes such as Capillaria, Eustronggylides, Camallanus, and Contracaecum are common among many fish species.
Hobbyists have been using it for years now and there are few reports of negative effects on fish. At higher dosages than recommended, there have been some reports of cloudy water at initial treatment and very few reports of rapid respiration or stress-related behaviour in fish. May be harmful to ornamental snails (Rabbit snails, Mystery snails, Nerite snails): temporarily remove them during treatment.
Below is the treatment protocol used for treating parasites with Aquarium Smiths Dewormer.
- Determine the appropriate dosage for your tank.
Fish dosage:
– 1 ml / 20 drops per 50 litres
Shrimp dosage:
– 1 ml / 20 drops per 100 litres.
- Treat with the lights off for 24 hours.
- Do a 30% water change and vacuum to remove the paralyzed worms in the substrate.
- Treat again in 4 days.
- Repeat steps 2-4 after 2 weeks.
- Repeat Aquarium Smiths Dewormer treatment after 2 months or when buying new fish.
Verified owner Trevor Lategan (verified owner) –
Had a nematode problem with my bristlenose plecos and this product worked like a bomb. Got rid of the nematodes almost instantly with no negative side effect on any of my tank inhabitants, including shrimp. Should be your only choice for getting rid of nematodes