Harlequin Rasboras possibly sick?

Hemikyle

Tank
What is the water volume of the tank? 29G
How long has the tank been running? Tank has been running prior to me taking over from prior owner but I would definitely say a few years.
Does it have a filter? Yes, Canister filter
Does it have a heater? Yes.
What is the water temperature? 78°F
What is the entire stocking of this tank? (Please list all fish and inverts.)
2 BN Plecos
1 Yo Yo Loach
6 Harlequin Rasboras
2 Albino Corydora Catfish

Maintenance
How often do you change the water? Once a week
How much of the water do you change? 30% - 50%
What do you use to treat your water? Prime
Do you vacuum the substrate or just the water? Substrate

*Parameters - Very Important
Did you cycle your tank before adding fish? It was previously already cycled.
What do you use to test the water? API Test Kit
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia: 0 - 0.25ppm
Nitrite: 0ppm
Nitrate: 0ppm
pH: 7.4

Feeding
How often do you feed your fish? Once every day
How much do you feed your fish? 2 pinches of flakes and a couple wafers for the bottom feeders.
What brand of food do you feed your fish? Top Fin Tropical Fish Flakes (ATM)
Do you feed frozen? Not yet.
Do you feed freeze-dried foods? Not yet.

Illness & Symptoms
How long have you had this fish? About 1 month since picking them up from previous owner.
How long ago did you first notice these symptoms? A week after having them. Approximately 3 weeks ago.
In a few words, can you explain the symptoms? Bloated belly & Curved spine/ tail.
Have you started any treatment for the illness? Not yet.
Was your fish physically ill or injured upon purchase? No.
How has its behavior and appearance changed, if at all? No behavior change. Just bloated belly and curved spine/ tail.

Explain your emergency situation in detail. (Please give a clear explanation of what is going on, include details from the beginning of the illness leading up to now)

Currently 2 of my Harlequin Rasboras are looking a little strange. One has a curved spine/ tail & another one has a bloated belly. I noticed them like this a week after owning then. I'm assuming they have had this prior to me even getting them it seems. Pictures will be below. I do want to know if any of this is contagious to other fish? And if not I'm assuming it would be okay transfer all the remaining healthy looking fish into my main tank? And proceed with a treatment? Please any help will be greatly appreciated. Thank you.
 

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BigManAquatics

I would try fasting the bloated one for a few days, like 3 or 4. Can be pretty easy to overfeed a wish unknowingly. Not sure on the curved spine, meds don't fix that!
 
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Hemikyle

I would try fasting the bloated one for a few days, like 3 or 4. Can be pretty easy to overfeed a wish unknowingly. Not sure on the curved spine, meds don't fix that!
Do you think it would be okay to bring the rest of the fish into my main tank that aren't experiencing any issues or any difference in appearance? Or could I transfer them all since this all doesn't sound contagious? Or spreadable?
 
Upvote 0

BigManAquatics

Do you think it would be okay to bring the rest of the fish into my main tank that aren't experiencing any issues or any difference in appearance? Or could I transfer them all since this all doesn't sound contagious? Or spreadable?
Probably.
 
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