Whitespot appeared 6 months ago, ran 2 courses of Medic (sticking strictly to the instructions) cleared it up, haven't had any outbreak since (*touch wood)
I tried this product and i just wasted a lot of money. here i norway this product is so expensive, but in reality it just eating money. Remeber, only copper that can kill and remove ick (whitespots).
I used this A short time ago, and cleared the white spot, after about 12 day
a bit on the expensive side in the UK, however it does what it says