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I have had some of my goldfish change colors just like what you described,
including the lips, fins, sides and anywhere else on their body as they go from black to gold or whatever other color - if all your tests come up good, you probably don't have a problem, IMHO Gale :~) I have noticed a problem with a Goldfish for a while now. I noticed that he had black marks on his gill covers and down both sides, just in certain areas, not all over. This was noticed over a year ago when my fish returned from my brothers pond, I'd moved house and had to wait to build my pond. These marks did not get any worse and possibly reduced slightly until 2 to 3 weeks ago. The fish started coming to the surface and going straight back down, bubbles would then come to the surface. I thought the black marks were possibly signs of a previous problem with Ammonia although I have never found any trace of Ammonia in the pond since it was built almost 2 years ago. I thought that the fish coming to the surface was possibly a sign of gill flukes so used Malachite and Formalin on two occasions as directed by the labels on the treatments to try to get rid of anything in the pond that may cause problems. Today I noticed that the Goldfish has also got black lips and black tips on his tail and fins. I can't see anything else wrong with any fish in my pond. I've got Goldfish, Orfe, Tench, Koi and Shubunkin in the pond, they all seem happy apart from this one fish. I've checked PH, Ammonia, Nitrate and Nitrite and can't find anything wrong. Everything is reading 0 except for the PH which is 7.5, it has been 7.5 since the pond was built, my pond is 17' x 9' x3'. The pond was well stocked with plants but I've reduced a lot of the planting to reduce clogging of my filter. The reduction has only taken place this week and has had no effect on any readings with the test kits. My filter is rated at 6 times my pond capacity so filtering shouldn't be a problem. I have not tested the oxygen because my filter is returning water which oxygenates the pond and I've also got a second pump running as a fountain, again adding plenty of oxygen. Just to go a bit further over the top I've got a air pump adding more oxygen. To cut a long story short and get to the point. Has anybody any idea what these black marks, lips and fin/tail tips could be? Thanks in advance. |
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