Glo fish tetra not eating.

KingJamesIII

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My glofish tetra is one of 4 tetras in my aquarium. It is the only one who is constantly opening and closing its mouth at a fast rate. I will admit I have some platys in here and balloon mollies.. I am new to fish and learned my water needs different fish. They have been surviving just fine though. Had most my fish for 6 months now. Anyways, I added a 50% water change 2 days before the glofish joined the community. He is the only fish doing this and is only a few days old in the tank. He also does not eat!! I’m thinking he might need more glofish to feel secure? I have clean water my ph is around 7, I have a gh of 75 ppm, low alkalinity and nitrite levels.. anyone have any ideas?
 
How often do you change your tank water?

Take note that whenever you introduced new fish, they might bring disease with them.

When a fish is breathing fast with its mouth open and close very frequently, usually it's due to gill flukes(parasite) infection which will kill the fish soon. [Assuming that your water quality is ok ].
Did you see any of your fish scratching against the tank or objects?

Gill flukes is dangerous as it will kill your other fish one by one. They are hard to be killed. When the flukes are in eggs/cysts form, you can't kill them with any medication.
You will have to treat your tank with Flubendazole for at least 1.5 month.
If you have sand and plants in the tank, it may be even harder to treat.

Intially, I tried changing tanks, new filters and removing all substrate(bare tank) every 4 days for up to 4-5 times but yet I couldn't kill off the gill flukes. Each time the gill flukes returned, it would kill some of my smaller fish. Bigger fish can last longer when they are infected.
In the end, I only managed to eradicate the gill flukes after about 3 months of treatment.
Also, take note that you must treat them with full doze during treatment. If not, the flukes will develop immunity to the medications and your medications can't be used any more.

https://www.amazon.com/dp/B085TQ75Z5/?tag=ff0d01-20
 
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Some information for you to read.


 
How often do you change your tank water?

Take note that whenever you introduced new fish, they might bring disease with them.

When a fish is breathing fast with its mouth open and close very frequently, usually it's due to gill flukes(parasite) infection which will kill the fish soon. [Assuming that your water quality is ok ].
Did you see any of your fish scratching against the tank or objects?

Gill flukes is dangerous as it will kill your other fish one by one. They are hard to be killed. When the flukes are in eggs/cysts form, you can't kill them with any medication.
You will have to treat your tank with Flubendazole for at least 1.5 month.
If you have sand and plants in the tank, it may be even harder to treat.

Intially, I tried changing tanks, new filters and removing all substrate(bare tank) every 4 days for up to 4-5 times but yet I couldn't kill off the gill flukes. Each time the gill flukes returned, it would kill some of my smaller fish. Bigger fish can last longer when they are infected.
In the end, I only managed to eradicate the gill flukes after about 3 months of treatment.
Also, take note that you must treat them with full doze during treatment. If not, the flukes will develop immunity to the medications and your medications can't be used any more.

https://www.amazon.com/dp/B085TQ75Z5/?tag=ff0d01-20

I woke up today and he unfortunately died.. I do not notice any fish scratching against anything. I change my water once a week usually 50%. I’m very upset because I want to do this right, but I’ve been having a few different fish not make it. I’m really hoping this isn’t a parasite because I just got the fish a few days ago, and all the others are doing fine.
I’m also very scared about parasites. Is there a sure way for me to tell what it is? Or is this something I have to look for every chance I get to make sure no other fish were affected?
 
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I agree with Lajos that this is a disease. Follow the advise, Lajos is very knowledgeable.
I had this symptom in a group of melanotaenia praecox, I'd lost a couple in quarantine but had treated them with levamisole and the rest seemed ok so I added them. I have added to the group a couple of times to try and keep the numbers up but lose one every couple of months or so. I've given up on buying rainbows for now, the cories and tetras in that tank don't seem to get it.
I'd be interested to know if this is the same disease/ parasite, another symptom in a couple of my fish was unilateral popeye/cloudy eye.
 
I woke up today and he unfortunately died.. I do not notice any fish scratching against anything. I change my water once a week usually 50%. I’m very upset because I want to do this right, but I’ve been having a few different fish not make it. I’m really hoping this isn’t a parasite because I just got the fish a few days ago, and all the others are doing fine.
I’m also very scared about parasites. Is there a sure way for me to tell what it is? Or is this something I have to look for every chance I get to make sure no other fish were affected?

Fish diseases are always the biggest challenge for fish keepers.
They fish are often infected when they are brought into the fish stores.
Quarantine your fish for 3-4 weeks when you buy new fish.
Look for symptoms of disease during this period.

Usually when the fish are breathing fast, they are at late stages of infection and can be hard to save.

Continue to observe any symptoms of scratching and fast breathing.

For prevention, perhaps you can also add about 1 tablespoon of salt for every 10-20 liters of water for 2-3 weeks. This will kill most parasites in swimming stages.
But for parasites in cysts/eggs form, you may need to treat longer.
But according to some people, you can't use salt for longer than 3-4 weeks (estimation) for soft water fish as it will kill them.

Meanwhile, you can purchase Flubendazole or Praziquantel. You can use them after your salt treatment unless you doubt that its due to gill flukes.
But take note that some gill flukes may have become resistance to Praziquantel due to being frequently used.
Treat them for 1 month after your salt treatment.
If the flukes are not totally eradicated, they will kill your fish each time they return and they can even develop immunity to the medications.


https://www.amazon.com/dp/B0006JLPCC/?tag=ff0d01-20
 
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How often do you change your tank water?

Take note that whenever you introduced new fish, they might bring disease with them.

When a fish is breathing fast with its mouth open and close very frequently, usually it's due to gill flukes(parasite) infection which will kill the fish soon. [Assuming that your water quality is ok ].
Did you see any of your fish scratching against the tank or objects?

Gill flukes is dangerous as it will kill your other fish one by one. They are hard to be killed. When the flukes are in eggs/cysts form, you can't kill them with any medication.
You will have to treat your tank with Flubendazole for at least 1.5 month.
If you have sand and plants in the tank, it may be even harder to treat.

Intially, I tried changing tanks, new filters and removing all substrate(bare tank) every 4 days for up to 4-5 times but yet I couldn't kill off the gill flukes. Each time the gill flukes returned, it would kill some of my smaller fish. Bigger fish can last longer when they are infected.
In the end, I only managed to eradicate the gill flukes after about 3 months of treatment.
Also, take note that you must treat them with full doze during treatment. If not, the flukes will develop immunity to the medications and your medications can't be used any more.

https://www.amazon.com/dp/B085TQ75Z5/?tag=ff0d01-20
I appreciate all the info you gave me. As a beginner there’s a lot I’m learning each day with these fish. I’ll definitely keep an eye on them everyday, and do you recommend treating them even if I don’t notice any parasites?
 
I appreciate all the info you gave me. As a beginner there’s a lot I’m learning each day with these fish. I’ll definitely keep an eye on them everyday, and do you recommend treating them even if I don’t notice any parasites?

Usually disease spread very fast in aquarium as our tanks are small.
Whenever one fish is infected, it will spread to others. The parasites can easily multiply by hundreds within 3-4 days(for normal water temperature) after hatching.

In fact I have to treat my fish whenever I buy new fish especially if you don't have extra tank to quarantine them.
It's too risky not to treat.

But first make a large water change of 70% or more to remove as much as possible any remaining parasites and siphon out the bottom for any parasites eggs.
 

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