The Data Life one is very good. My horse has always been prone to seedy toe but since I've been using this (on my farriers recommendation) there's been no recurrence.
Agree with Sally - I have had success with the Life Data disinfectant in treating white line disease. I think they are they same company that make farriers formula. I have also used Milton sterilizing fluid which is quite a bit cheaper!
Use a capful of Hibiscrub diluted in a pint of water first, scrub this all over the frog, soles etc until it foams. Then spray the frog with Net Tex Frog Health disinfectant. Clears thrush within about 3 days. Brilliant stuff, we were recommended this by our barefoot trimmer and it really does work.