I have a 3000L pond in my garden and the dozed or so comets I put in several years ago now number 50. Generally they look great with flowing tails and a range of colour, but the larger ones have hemisherical lumps the size of half a small pea. The fish seem well and I only feed once a week. Is there a goldie out there who knows what this might be and how I should best treat it?
Cheers,
Greg
Cheers,
Greg