Hi, the owner mentioned cycling the tank and said he has left some of the water in the tank along with in the filter for that reason. I have just been to the Vets at Pets at Home and they are not helpful at all, I was informed to ask the staff in Pets at Home instead as they would know more. When i did, they only reiterated what was said to me when I first went in on mon/tuesday.
They did say the outlook does not look bright as they have never seen one as bad as this before. I am going to contact my local vet tomorrow when they are open about antibiotics as if it is indeed columnaris then wouldn't he need anti bacterial treament and not anti-fungal?
They also said to do a 25%/30% water change once a week only as any more than that will be removing any treatment I am using.
Thank you for the info on the Dr Tim's One and only nitrifying bacteria, I will definitely look into this!