Blagdon Fast Acting Anti-Fungus & Bacteria Water Treatment for All Pond Fish, Finrot, Mouthrot, External Bacterial Infections, Wildlife & Fish Safe, 1 Litre

Working but will need a second dose

You can tell where it has gone as it turned the water a nice green colour

One of my larger coloured koi had fluffy growths on its fins, saw this and thought better take some action. It's a five day treatment so because of the volume of the main pond I bought a small kids pool as a quarantine tank, about 500 litres, this was more economical than trying to treat the main pond and had the benefit of being able to keep my eye on it better. I would have required about 3 bottles to do the main pond over a five day period and it's not cheap. It worked fine and now back with it's friends in the main pond.

Bought this as my pond went green after my pump failed and the water stayed green even after buying a new pump. Instructions are very easy to follow and very easy to use, just calculate your pond water in gallons and squeeze the amount you need to the top and pour it into your pond ( I added mine to a jug of water first just so it diluted it a bit). After a few days the water improved a lot but was still a bit green so I added a bit more and after a few more days the water cleared. Fish now look very happy.

Persisted with this but issues just return. Ended up getting proper veterinary stuff that sorted it with a single dose

Good

Just as advertised and quick service

Works