My betta has finrot that won't go away. He's a crowntail and bits have been coming off his fins and tail. I haven't seen any red streaks as his main colour is orange red. He also has purply blue patches on his body and fins, and the damaged edges are all this colour.
I first treated with melafix but this had no effect. I've been using King British finrot and fungus control (all the nearest shop had) for the last couple of weeks. This seemed to be working at first, but then the bits started coming off again.
What should I do? Carry on with this med, or is there anything better I could try (bearing in mind that I'm in the UK).
Before anyone asks, the tank is 13.5litres/3.5 gallons. It has a filter (Elite mini set to slowest flow) and heater. NH3 0, NO2 0, NO3 5, pH 6.9. Water changes are 20% twice a week. I would like to get him a bigger tank, but trying to persuade my husband is the biggest problem!
I first treated with melafix but this had no effect. I've been using King British finrot and fungus control (all the nearest shop had) for the last couple of weeks. This seemed to be working at first, but then the bits started coming off again.
What should I do? Carry on with this med, or is there anything better I could try (bearing in mind that I'm in the UK).
Before anyone asks, the tank is 13.5litres/3.5 gallons. It has a filter (Elite mini set to slowest flow) and heater. NH3 0, NO2 0, NO3 5, pH 6.9. Water changes are 20% twice a week. I would like to get him a bigger tank, but trying to persuade my husband is the biggest problem!

I usually just treat with really clean water and a smidge of aqua salt. Is he Ok with the filter my boys all hate them and sulk for England if I pot one in a tank?