Questions tagged [goldfish]

Questions and issues regarding goldfish - one of the most popular aquarium fish. Use with other relevant tags, such as `feeding` or `health`

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19 views

Keeping fry out of canister filter?

I have a ~1000 gallon pond in my yard. It contains mosquitofish and goldfish. The pond currently has 2 of these submersible filters similar to this: However, to clean the filter, I need to wade into ...
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1answer
98 views

How to prevent snakes from eating goldfish in pond?

Some snake found its way into my pond. I heard that local snakes will eat the fish. The pond is 1/2 underground and 1/2 above ground with a 2 ft high brick wall all the way around. Is there some ...
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2answers
94 views

How to reduce excess micro-algae in pond

I have a small pond (I don't really know the volume, maybe 400 liters) with goldfish inside, they seem healthy with no apparent problem. The pond is constantly invaded by micro-algae that cannot be ...
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34 views

Reliable way of giving away goldfish [duplicate]

About a year ago i built a small pond with 5 goldfish inside. Apparently they really liked it because they started reproducing a lot and now there are more than 15 and i'm guessing that the space they ...
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1answer
42 views

Goldfish with intermittent swim bladder problems

I have an 11 year old common goldfish and he has recently been having some swimming issues-but only in deep water after a few hours. He is fine in shallow water and he can swim fine for about 8-9 ...
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0answers
28 views

White bumps on goldfish

I have 2 goldfish in a 20 gallon (76 liters) tank and last night I noticed one of them developed a white bump on its side, then this morning I noticed the other one has a similar white bump on its ...
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1answer
31 views

Will shubunkin and other fancy goldfish eat smaller fish in a pond?

I am building a 20,000 gallon backyard pond for some shubunkins and other fancy goldfish that have outgrown their aquarium. Our climate is such that the pond will only freeze occasionally, and with ...
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1answer
188 views

Should I euthanize my goldfish who has been floating for a month?

I have had my Oranda goldfish for three years now and he/she/it has been floating at the top of the tank upside down for the past month. The tank is a 40 gallon with 2 aqua-tech 40 gallon filters. ...
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1answer
24 views

Goldfish with white spot/fungal infection/something else?

Anyone know what this is and how to treat it? One has a white lump near its eye, the other some white stuff at the end of its fan tail. Both usually in a pond with others but currently quarantined in ...
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2answers
118 views

What is this gray blob that suddenly appeared in my aquarium?

This blob of gray stuff has suddenly appeared in my 10 gallon aquarium where my kids' comet goldfish has been happily living for 6 months. I've also started to see some green algae form along the ...
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2answers
203 views

My goldfish is dying

I have had 2 goldfish for 2 years in my aquarium. This one was good last night. I don't know what happened today it is somehow floating on side with little movement, like sleeping. I put it outside of ...
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2answers
187 views

My brand new goldfish is gasping for air

Today I went to the pet shop and got a goldfish. My tank is 20litres and the goldfish is pretty small. When I first got the fish it was gasping and eating the bubbles in the bag I thought this was ...
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53 views

My empty but not empty fish tank

My Betta died a couple weeks ago so now i have a tank filled with water, can my small female goldfish be in the small rectangular container that has rocks a cave and a sea anemone, and this tank has ...
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2answers
714 views

How can I get rid of a goldfish

A few weeks ago my wife rescued a goldfish from a public fountain. We put it in a fishtank lended by our neighbors then we installed a filter and some decorations. The thing is that : after a few ...
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1answer
230 views

Is my fish suffering from fin rot or is this just a sign of wear and tear?

I've had this goldfish for around 2 years now, and have no problems with it at all. I changed it over to a bigger tank (22 Litre) around 3/4 months ago, and until now have had no issues. The tank has ...
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145 views

Why did all my goldfish suddenly die?

I have read this question, and this one, about goldfish/pond life suddenly dying. These situations are similar, but not identical to my own, and so I'm not sure whether this question is a duplicate. ...
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1answer
491 views

My goldfish's entire wen is gone, please help me!

So 2 days ago we cleaned the tank, all fish were fine. It took 24 hours for the water to clear up and all the fish were still fine, but I noticed a piece of fish poop stuck to the head of my baby ...
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2answers
478 views

What is this lump on my goldfishes head?

I just noticed today that my goldfish has a lump on his head that is white around the edge with a red centre. He is eating and behaving normally. He is nine years old and has never had any other ...
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0answers
194 views

Goldfish laying at an arch- what should I do? [duplicate]

I have one common goldfish in a 20 gallon tank with a filter and heater. She has been sitting in this arch position for about 4 hours with little to no improvement (couple of little energy bursts). I ...
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1answer
4k views

Goldfish unresponsive, what should I do?

I have a common goldfish that lives in a 20 gallon tank by herself with a filter and heater. Recently she has been showing signs of swim bladder disease because she wouldn’t swim properly. After ...
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1answer
108 views

Can goldfish have opinions?

I have two goldfish for 2 years named Archimedes and Nelson. They lived in an aquarium with big white gravel. I changed their soil with dark blue pebbles as a result of advice given by my breeder. A ...
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1answer
529 views

Goldfish behaviour after medication

My goldfish was showing signs of illness, then started shredding its tail and losing its colour - I did a complete water change and cleaned the filter and tank/gravel. I purchased some Tri-Sulfa ...
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1answer
75 views

I have a thirty gallon tank with seven fancy goldfish

I have a thirty gallon goldfish tank with seven goldfish in it. Is this overstocked? All but two of the goldfish seem healthy, with one sometimes bottom sitting and the other with black marks that I ...
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1answer
65 views

Is it safe to add medication in a fish tank if there is no sick* fishes? [duplicate]

My water conditions aren't the best, yet, my fishes are doing their best so far. I want to put a fungus and fin rot remedy in the fish tank but none of them have it (at least I don't think so). Two-...
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49 views

What is that white spot on my goldfish? [duplicate]

Its been like a few days since it showed up, how do i treat it, Im tight on budget, also my red fish passed away today, and yesterdaay i bought this aquarium with filter, the capacity was 6l on old ...
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1answer
208 views

Does a goldfish experience feelings of loneliness?

My goldfish has been the lone fish in her tank for a number of months now, and quite recently, has begin to behave differently and remain in one small area on the very bottom of her tank. Could ...
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1answer
138 views

Can goldfish jump out of water?

Previously I asked "Can goldfish be Trained?" and the answer was yes. But my plan is to train my fishies to jump out of the water get food. I did a Google image search and it looks like goldfish can ...
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1answer
139 views

Can goldfish be trained?

I've recently got a family of goldfish and I want to encourage them to be interactive. Can they be trained? Background: I have 3 comet goldfish. During the transition to their tank, I must have ...
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1answer
151 views

How do I tell if my goldfish is pregnant?

I'm new to keeping fish. I picked up 3 comet goldfish a couple of months ago. They've been living in the same tank and one is getting bigger, way bigger than the other 2. Is it pregnant? How can I ...
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1answer
387 views

Goldfish swim bladder disease? Please help

Hi all. Apologies in advance for the long post. Looking for any help I can get please. I cleaned my goldfish tank last night and went to bed early, this morning when I went to feed him I found he is ...
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1answer
76 views

Plants for dirty/algae ridden goldfish aquarium

I have a 20 gallon (70 liters) freshwater aquarium with two comets, which are now about 2 inches each. The aquarium gets dirty with algae covering the glass and all the plants very quickly after ...
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1answer
655 views

Is my tank overstocked with Goldfish?

Is this tank overstocked? There are many baby Goldish and a couple of adults (some not visible in the dark area). According to some people it should be OK, others say that goldfish need 40gal (80l) ...
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2answers
3k views

Help. A common goldfish living in 3 gallon tank

My wife got a goldfish from our pre-school. It came in a "fishbowl" the size of a large coffee cup and a tiny ziplock with fish food. It was severely stressed: fins clamped at his side, sunken belly, ...
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1answer
553 views

how do i keep my goldfish tank's bottom clean? [duplicate]

my goldfish tank's water is crystal clear and the filter is working fine but goldfish creates a lot of waste so their manure collects on the bottom of the tank(which is bare), is it okay or will it ...
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25 views

Goldfish-unknown white marks

I’m really concerned about one of my goldfish as this morning I noticed 2 marks on his body. One near the head and one near the tail. I noticed my bigger goldfish nudging him out of the way at feeding ...
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1answer
1k views

When to euthanize a sick goldfish? [duplicate]

This poor guy, purportedly a lionhead, has been bloated like this for a month. He was lying upside down so I did feed him some cooked peas which might have helped but now there's a large red patch on ...
2
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1answer
425 views

Fantail goldfish looks bloated - Does this mean he is sick?

I bought two goldfish last summer and they've been doing great in my 10 gallon tank, but I am starting to wonder about one of the goldfish. I don't know if he is sick, in pain or what. When I bought ...
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2answers
2k views

Why are my fish always scared?

I have a tank with four 1.5" Shubunkins, which I've had for one month. There are no other fish. It is a glass-bottom tank with no substrate (for easy cleaning), and has many floating plants for them ...
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1answer
85 views

Can goldfish eat sea lettuce?

I picked up some sea lettuce attached to stones from the local beach near where fresh water was entering the sea, and have washed off the salt water, and placed it into my fresh water tank. The leaves ...
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4answers
378 views

Goldfishes died first night

We bought 3 small goldfish from Walmart last night. We poured some tap water in the tank and waited for the chlorine to be released. After 2 hours, we put them in with their water (initially in the ...
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2answers
101 views

Looking for an automated aquarium

I'm looking for a fully automated aquarium. Need an automatically timed feeder for the fish Could the aquarium could automatically clean itself A battery backup for both the feeder and the cleaning ...
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2answers
1k views

My little red eared turtle ate a dead gold fish should I be concerned?

This is my little red eared turtles image eating my pet gold fish which died of natural causes. Should I be worried? Is there anything I should do?
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2answers
15k views

What is this tufty white spot on my goldfish's head?

I noticed today that my goldfish, Thunderbolt, has a tuft of white on its head. Note: Same fish. coloration difference due to camera flash I've had the fish in a 10 gallon tank by itself for ...
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1answer
88 views

Goldfish strange behavior - seemingly stressed and less mobile

My goldfish is being abnormal. It has closed upper fins, refuses to swim, is not alert while feeding. It looks stressed, dorsal fin is gravitating downwards as you see in the images. Unlike others, it'...
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1answer
101 views

What kind of substrate is best for fancy goldfish?

I read that gravel is unsuitable for fancy goldfish, as the fish will eat the pieces whole and get sick. I installed sand in my tank, but I find it very difficult to clean, as when I siphon, the hose ...
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1answer
102 views

Goldfish (shubunkin) behaviour changes

I have a 20 gallon (76 liters) tank with 6 goldfish - all small sized. I have had this tank for around 6 months. I do weekly 50% water changes and feed them twice a day - mostly pellets and flake food....
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0answers
663 views

Lump on Goldfish

Several months ago my red cap oranda developed a lump on his side. It resembled an acne nodule. The lump was beneath his scales and didn't seem to cause him any trouble. He had some mild red streaking ...
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0answers
170 views

Fatal cotton like fungus on goldfish spreading to other?

I've had a black moore goldfish for 5 years. I just recently brought him with me to a new city and he's temporarily in a five gallon aquarium. Originally he was in a 30 gallon aquarium with other fish ...
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4answers
3k views

Can I switch to using tap water with a larger tank?

I have always given my fish distilled water but I recently got a larger tank. Would it be dangerous to give them tap water with water conditioner in it if I have been giving them distilled water?
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3answers
2k views

Is changing water daily in a fish bowl harmful to the fish?

I have two goldfish and have kept them in a fish bowl for now. As I do not have a water filter in there, should I change the water daily in the bowl? It does seem a bit dirty after a day, but I don't ...