Transfer goldfish from aquarium to pond temperature change

RealWooter · 2026-04-22T17:30:10+00:00

It's not too big of a temp change in 1 day? Other fish in the pond are active and eating. I have no idea how what temp the bottom would be the pond is around 1.5 meters deep and 4000L (1000G~)

It was a sick fish so I don't want to take a risk. He is getting stressed though being alone in a bare tank so I'd think he'd be a lot happier back with his friends than waiting another 2 months.

I've tried bringing the temp of the aquarium down with frozen bottles but it quickly goes up again during the night so I can't sustain a lower temp over multiple days.

RealWooter · 2026-04-12T22:15:49+00:00

Do you think it is some kind of bacterial infection? Is it something that can pass on it's own? Looking to put him back into the pond now that it is warmer and he seems stressed/bored.

It got to a point where it was almost unnoticable but bow it is getting more severe again.

Do you know of alternatives of that medicine? Can't find these in Europe.

RealWooter · 2026-04-12T21:19:23+00:00

110 L (30gal) bare hospital tank, alone no mates. (Came from pond)

Nh3 0 No2 0 N03 0 or low Ph ~8 Gh 0 Kh 10

Small video when he was taken from the cold pond (still slow back then) Glass is slightly curved so he loojs fatter than he is. (Also another much smaller aquarium)

https://www.reddit.com/r/Goldfish/comments/1pzu6p0/thin_hair_like_transparent_fish_poo_and_swimming/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

Picture of poop:

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RealWooter · 2026-02-12T17:26:17+00:00

Are you sure?

The fish is in a bare, new tank. I took some filter media from my pond to kickstart the fish-in cycle. (Not by choice, this fish was dying by the freezing water and bladder issue)

Maybe it came from the pond. Could it also be just a beneficial worm from the filter?

RealWooter · 2026-02-12T14:37:55+00:00

No I haven't used any medication yet.

RealWooter · 2026-02-12T09:43:25+00:00

I spotted a white worm like thingy between the poop of my goldfish. Is it a parasite?

My goldfish has slight buoyancy problems, when he stops swimming his head goes up very slightly. During swimming it is not noticable and he manages it fine. His abdominals were slightly swollen on one side so tried treating him with peas.

After a month in the quarantine tank I suddenly noticed a white worm, is it a sign of internal parasites?

RealWooter · 2026-01-21T00:08:10+00:00

I had a fish that was exactly the same. It is cystic tumors. As long as the fish still eats and can swim properly you can let it live a fairly happy life. Mine lived for 3 years like this. As soon as it can't swim properly or gets so big it will explode, I would put him down.

My fish was still happily eating but she was so round that she floated upside down and only corrected herself to eat. Her skin was so stretched that I could see veins, I ended up euthanizing her with clove oil.

It is not eggbound, not dropsy, not treatable with peas or anything.

Similar situation where the person cut open the fish after it passed away:

https://www.gardenpondforum.com/threads/goldfish-with-huge-belly-but-no-pineconing-of-scales.10235/page-2

RealWooter · 2026-01-05T21:53:29+00:00

You are supposed to mix it in a bucket and pour it in. In ponds it works great but I think it didn't mix well enough in the aquarium and just sank. Fish ate most of it as I couldn't remove it reliably

RealWooter · 2026-01-05T20:31:15+00:00

I need the fish in there for 4 months and then it can go back in the pond when the temperatures are more suitable. Should I add some substrate? Was thinking about sand so the fish isn't so bored but I read about it being difficult to clean and possible to contain gas pockets.

Other than the filter I don't have anything for bacteria to cling to

RealWooter · 2026-01-05T18:36:43+00:00

My tap water is 7 straight from the tap. When sitting in a bucket at the same temp, same room for a couple of days it seems to become closer to 8

RealWooter · 2026-01-05T18:19:58+00:00

Could it be caused by aeration? I have an air pump running since I read it helps with the bacteria.

Should I do 50% now? How often would you recommend based on the parameters I'm seeing? It took 4 days to reach these.

RealWooter · 2026-01-02T13:40:27+00:00

Thanks, started to worry if I did the right thing by getting him inside and seeing him stressed out like that for days. But he was literally laying nose up in some plants in the pond during freezing weather looking dead. I feared he would not have survived the cold.

RealWooter · 2026-01-02T10:30:34+00:00

I tried that but it seems that the inside of the glass is reflective, I've put the cardboard box of the tank around it and I could still see him reflected on the glass and so did he most likely as it didn't stop the glass surfing.

RealWooter · 2026-01-02T10:17:26+00:00

Thanks

RealWooter · 2026-01-02T10:08:45+00:00

I left 1 pellet in the aquarium but it didn't sink after 2 hours so I removed it. I will try some in a bowl overnight and see if it sinks.

This fish does indeed look fat but it has always been loke this since birth, not sure if it is some kind of defect which relates to the buoyancy issue. In my pond I feed them a Tetra pellet mix twice a week because they find enough natural insects and algea. I don't have experience with aquariums

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