Best fish dewormer?

[biofish]

I am in need to deworm my fish, and I just wanted to discus which product would be best. The tank I will be medicating is a 29 gallon with make guppies, glo zebra danios (the ones obviously infected) and Cory catfish.

I’m not sure exactly what type of parasite it is, but they have rapidly lost weight but it doesn’t affect their eating or swimming. So some sort of internal one.

I’m looking at this one currently but I just wanted a second opinion because I don’t really trust my LPS that much: https://www.amazon.com/dp/B09F4HV8HH/?tag=ff0d01-20

 

[biofish]

Or how bout this? https://www.amazon.com/dp/B004LOBGYA/?tag=ff0d01-20

 

[Colin_T]

flubendazole or levamisole

 

[OliveFish05]

I have used Levamisole before. I ordered it from Discus.com as I was having trouble finding it anywhere else. My cory catfish did perfectly fine with it! The 10 gram pack was WAY more than enough to treat a 55 gallon tank