Thanks for the help guys.
Treated with Levacide (7.5% levamisole) at 1.5ml per 7.5l for 24hrs them did a large water change.
This was in line with some instructions I found online.
The angel has shed all the visible worms but a molly still has one large one hanging off him. These were the only fish with visible worms.
Instructions said to dose again for another 24hrs after 3 weeks but should I dose again sooner since the molly is still showing a worm?
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