palaeodave wrote:How are you going to get hold of it?
Levamisole is not available over the counter in the UK you will need to find a vet who can supply it. I have been lucky enough to find a local vet who specialises in exotic pets (yes, fish are exotic). He was aware of the use of Levamisole to treat fish and had most of a 500ml pack of 'Levacide' pig de-wormer left from the last person who was after some. I was able to buy 30ml for £3.52 which should treat our tanks.
I would be very cautious in importing this from overseas, there are usually lots of restrictions on medicines coming into this country.
In case you can't find one locally to you the vet i went to was:
Grazely Veterinary Centre
12 Guildford Rd West
Tel: 01252 544244