Problem with threadfin rainbow

[hroom88]

A month ago I had a school of about 20 in a 75g, this being my third batch. Now there are about 12-14 remaining.

Every month or so one or 2 of these otherwise seemingly healthy fish will develop these lumps, or simply turn pale with clamped fins[sometimes without any lumps] and die(first 2 pics). This continues till there are about 3-4 remaining, and they grow to full size without any symptoms whatsoever[Last pic].

I checked my;
NH3 - 0
NO2 - 0
NO3 - <20

Feed them Hikari Micro pellets every alternate day and occasionally a blanched pea.

Tankmates are Otos: 4 and Neocaridinas.

Anybody has any suggestions, ideas?

Initially I was assuming this to be fish tb, but then 3/4 remaining from each batch wouldn't have been possible. I had thought of goitre as well, but I am waiting for your opinions.

P.S. This problem targets females primarily with the females dying first.

 

[Coursair]

Are you crushing the micro pellets ?

Threadfins have a small mouth and an even tinier throat.

I crush up the micro pellets between my fingers. I also crush up Omega One color flakes.

I feed frozen baby brine shrimp often

I just started feeding cyclops.




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[hroom88]

Yes I crush them, however, I have not been able to get my hands on the brine Shrimp. I am thinking of culturing some infusoria for the purpose.

What do you think is the problem with these fish? Is it some kind of bloat? Malnutrition or anything else?

 

[Coursair]

Yes I crush them, however, I have not been able to get my hands on the brine Shrimp. I am thinking of culturing some infusoria for the purpose.

What do you think is the problem with these fish? Is it some kind of bloat? Malnutrition or anything else?

Sorry, I don't know. My first thought was not enough food of the right size.

I've only owned a few. Mine did great till I crashed my tank due to being I'll/injured and not doing maintenance.

I still have my one female and she's great. I'll be getting more soonish.


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[Delapool]

Perhaps stress related? How close is your ph, temp, filter flow and lighting to their preference range? Just thinking of neons I had that didn't do well in a high light/flow tank but were ok in a small tank.

 

[hroom88]

Perhaps stress related? How close is your ph, temp, filter flow and lighting to their preference range? Just thinking of neons I had that didn't do well in a high light/flow tank but were ok in a small tank.

Ph - 6.7-6.8
temp - 77°f
filter - 2217
lighting is average, my tank being planted. They seem to like swimming against the current which is opposed to what I have read.

 

[Coursair]

They can choke on food. I would try some new foods and see if that helps.
I feed crushed Omega One color flakes as well as the other foods.

Can't wait to try Kensfish Golden Pearls ? lots of sizes of food.


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[brennae]

I feed mine flakes and a variety of frozen foods like brine shrimp, daphnia and blood worms. As was suggested, I would try changing foods first and see how that works. Good luck!

 

[hroom88]

When you say frozen, you don't mean freeze-dried, do you?

 

[hroom88]

They can choke on food. I would try some new foods and see if that helps.
I feed crushed Omega One color flakes as well as the other foods.

Can't wait to try Kensfish Golden Pearls ? lots of sizes of food.


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They were on azoo micro pellets, didn't work before I switched to fry food, before finally moving on to hikari pellets.

 

[Coursair]

When you say frozen, you don't mean freeze-dried, do you?

No. I mean frozen. I don't use freeze-dried.


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[brennae]

I don't feed freeze dried foods. I have tiny dressing cups and I thaw a cube or two depending on which tanks I'm feeding in a little water and feed that.