Re: Black marks on scales on listless goldfish
Thanks for the reply
I guess it could have been an ammonia spike that I missed, are there any other ways of telling spike happened? I can't see marks on any other fish so lets hope they aren't affected.
I have also noticed yesterday and today that this one fish spends a lot of time grazing on the vegetation in the pond so maybe it is actually losing or changing its colour?
The only thing that is different in the pond right now is that blanket weed is growing like crazy and I have been pulling lots of it out each weekend but it has all grown back within a week. I am hoping that autumn/winter will stop this from happening for much longer.
I have an 850 litre pond which has been set up for about three months now, using a well cycled filter (>6 months) that was moved in from an old temporary pond.
The pond has eight small fish: 2 red comets, 1 yellow comet, 2 shubunkin (all of these were from the LFS in August) and 3 second generation goldfish fry (born this year in the old temporary pond).
One of the red comets has always been less active than the others, happy to just hover in one spot for a while and not at all fazed if I get close to him. Yesterday I noticed that he has black marks on his sides, and on taking a photo this morning I see that he has a black patch under his rear too. The marks are not on his gills or fins, and the scales don't look raised but its hard to see the detail because he can be deep in the water.
I regularly take readings (with my NT Labs test tube kit) and todays reading was <0.2 Ammonia, 0 Nitrite, 0 Nitrate. I regularly get 0 or low nitrate because (i suspect) the blanket weed sucks it all up as it grows like topsy in the pond.
Any help in diagnosing this would be much appreciated, thanks.
 He does swim well, and actively if there is food about or he wants to join in with the others, but he is by far the least active of all the fish [/edit]
It's fins looked fine, and there were no other marks that looked like disease. There were three small scuffed scales on the side that was always resting on the bottom, but I am putting that down to it lying on that side for almost a week.
The other fish still look fine, but we are on close watch at the moment just in case.
As sad as it is to lose the fish, I don't really feel that I have learned anything either, which is frustrating!
The pond is fairly new but there doesn't seem to be much I need to do to specially design it for winter, so I will just finish off the surrounding wall (it is a raised pond) to try and give it some thermal insulation before it gets cold.
Thanks for all the advice, it is appreciated. I just hope one day I know enough to help out on all of the other questions raised here
I'm just a beginner myself but I have an 850 liter pond with a powerful pump, filter and UV and I get the same as you. The water is very clear but all surfaces in the pond get covered in green goo fairly quickly and I get lots of hair algae too. I remove the hair algae as often as I can, it would take over the pond otherwise!
I know that doesn't help, but I hope it's reassuring
Thanks for the reply. I've been speaking to a few people I know who keep fish and they all agree with you that its a swim bladder problem and to treat it with salt.
I've been following the swim bladder advice on the Coldwater Help and Advice on these forums and have treated it with some epsom salts once so far (yesterday).
It is still having the same problems It still reacts to being touched and will swim off a bit but very quickly sinks and lies flat. It seems to have far less energy now. It doesn't seem to be moving if not prompted and I would guess it hasn't been eating since this started. I fear the worst.
Pond readings are similar today (0/0/2.5). The hair algae seems to have gone balmy at the end of last week and is everywhere.
A quick update for this morning, the fish is still lay on the bottom of the pool motionless apart from its mouth opening and closing. It is pretty much in the same position as last night but is slightly obscured by vegetation so I can't see too clearly, but there still doesn't seem to be any marks, lumps or bumps on it.
All other fish that I can see are swimming around and look normal.
I have the chance to go to the LFS this afternoon to get anything that might help, any ideas? Apart from the advice not to move it, would bringing the poorly fish inside into a new aquarium and warming it up a bit help (I would have to buy the aquarium etc!).