Guppy Trouble.

Hi there,
So this is an issue with a 60lts tank. Dimensions 61 x 31 x 37 cm.
Have had this one for almost 6 weeks now since it was upsized from a 20lts tank. I had used all the gravel, bio and ceramic media and plants as well from the 20lt and put it in the 60lt so it helps in cycling it better.
In the tank I have 8 guppies, 1 pleco and have had fry recently so have 10-15 fry as well. Its been 5-6 days my guppies are getting sluggish and coming up to one top corner of the tank and just stay there. The water tests are all good will add in more info on that tomorrow once I can do another one but they were doing great until now. One of the problems I have recognised is over feeding as one of the guppy is going vertical and as I can see it has got a disease now which I am trying to overcome with restrictive feeding(once in 2 days).
Now, I recently got in a second hand 350lts (dimensions 14.5m x 5.5m x 4.5m) tank which has been set up and going on for almost a week now. I have 3 neon tetras in there thats it. The water tests for it are normal but not the best. I am using Seachem Stability everyday to help with the cycling, will do my first 25% water change tomorrow. My question is, should I move in my 4 male guppies in that tank so they recover to start with? Can I also slowly introduce the fry in it as well because they are increasing in number? Also how can I help the fish to overcome the overfeeding disease?
apologies for the big thread, really appreciate the help.

Can you post some clear pictures and a short video of the fish so we can identify the problem?

Don't add chemicals/ treatments to a tank unless you know what the problem is.

The dimensions you put down for the big tank don't seem correct.

Don't move sick or potentially sick fish into a healthy tank because you can spread the disease to the healthy fish.

The best thing to do if a fish gets sick is a big water change and gravel clean the substrate every day for a week or until the problem is identified. The following link has some information about what to do if your fish get sick. It's long and boring but worth a read when you have some spare time.

Jaivansh Bhatt said:

Now, I recently got in a second hand 350lts (dimensions 14.5m x 5.5m x 4.5m) tank

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Colin_T said:

The dimensions you put down for the big tank don't seem correct.

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I think the decimal point is one place out. 1.45 x 0.55 x 0.45 metres = 359 litres. [ie 145 cm x 55 cm x 45 cm]

Sorry the dimensions added by you are correct. I am not able to attach a video but have added a few pictures. Will try and upload a video somehow.

Upload a video on YouTube and post the link here. We can go there to watch it

Jaivansh Bhatt said:

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Its seem like theres not enough oxygen in the tank, do you have an airstone?

Yes I have air and also my filter does the same.

The fish could have gill flukes, which can be treated with salt or Praziquantel.
Use 4 heaped tablespoons of salt per 20 litres of tank water. Keep salt in water for a month and then water change it out.

There is a lot of current in the tank and fish with long fins can struggle, especially if they have other issues. Male guppies with big tails can sometimes sit with their head up and tail down due to the extra weight of the tail. This is less of an issue with healthy good quality fish and more of a problem with inbred fish like guppies.

Having some floating plants like Water Sprite in the tank can help give the guppy somewhere to rest instead of constantly swimming.

Overall the fish doesn't look too bad. The only things I would treat it for is gill flukes and intestinal worms. Gill flukes first.

I have this tonic salt. Will use this hopefully they get better soon. Thanks alot for the help really appreciate the speedy response from the whole community and the leaders. Have a few more questions, will ask them after I do a water test today for my tanks and post the numbers.

The ammonia is somewhere between 0-0.10ppm,
Nitrite is almost 0 and nitrates are between 10-20ppm. Its not that bad I believe. Will do a water change tomorrow, add some seachem stability and a bit more salt.

Colin_T said:

The fish could have gill flukes, which can be treated with salt or Praziquantel.
Use 4 heaped tablespoons of salt per 20 litres of tank water. Keep salt in water for a month and then water change it out.

There is a lot of current in the tank and fish with long fins can struggle, especially if they have other issues. Male guppies with big tails can sometimes sit with their head up and tail down due to the extra weight of the tail. This is less of an issue with healthy good quality fish and more of a problem with inbred fish like guppies.

Having some floating plants like Water Sprite in the tank can help give the guppy somewhere to rest instead of constantly swimming.

Overall the fish doesn't look too bad. The only things I would treat it for is gill flukes and intestinal worms. Gill flukes first.

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Still not getting better..

If the fish is on its side, then it's over. Euthanise it.

Gill flukes chew holes in the gills and suck the blood out of the fish. It takes time (weeks or even months) for fish to recover from the damage they do. If there is too much damage, the fish won't recover and die from low blood pressure, anemia or suffocate due to the scarring on their gill filaments.

Having said this, it's still a good idea to treat the tank for gill flukes and intestinal worms to make sure there are none that can affect the remaining fish.

Colin_T said:

If the fish is on its side, then it's over. Euthanise it.

Gill flukes chew holes in the gills and suck the blood out of the fish. It takes time (weeks or even months) for fish to recover from the damage they do. If there is too much damage, the fish won't recover and die from low blood pressure, anemia or suffocate due to the scarring on their gill filaments.

Having said this, it's still a good idea to treat the tank for gill flukes and intestinal worms to make sure there are none that can affect the remaining fish.

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Thanks alot Colon, I understand . Can you tell me the best and the quickest way to euthanise and also some ways to treat the tank for gill flukes please.

The quickest way to euthanise a small fish is to wrap it in a couple of paper towels and whack it on the head with something hard and solid (hammer). If you can't do that, put it in a small container of aquarium water and pop it in the freezer. Leave until frozen solid then bury the ice block in the garden.

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You can use salt or Praziquantel to treat fish for gill flukes. Praziquantel also treats tapeworm.

Use 4 heaped tablespoons of salt for every 20 litres of tank water. Keep salt levels up for 4 weeks. Then dilute it out.

or

Treat with Praziquantel once a week for 4 weeks. Do a 75% water change and gravel clean the substrate 24-48 hours after each treatment.