Help! Strange White Lumps on Hengel's Rasbora.

[Derigriff]

Apologies if this is not the correct area, but after months of no issues with my tank I seem to be having a bit of an emergency! About a week and a half ago, one of my 10 T.Hengeli passed away. I was not particularly surprised by this, as this one had seemed particularly feeble ever since i got him, with poor colouration, and an oddly misshapen tail. I know that I probably should have removed him straight away, but this is my first tank, I didn't want to kill a live fish, and I don't have a quarantine tank I could put him in. All others seemed well, so I assumed it was an isolated incident. However, for the last 4-5 days, one of the other Rabsora has seemed very unwell, starting with a paler complexion, and what seemed like a darker discolouration near the base of the tail. Now, white lumps have appeared on both the tail and on their side, and they seem very unwell indeed! I'm not sure what to do about this, as I have no idea what's causing it. I've attached a few pictures, but my apologies of they are not so clear, as they tend to hide near the back of the tank most of the time. Any advice on how to proceed would be appreciated, as if it is infectious i would rather it didnt spread.

Even more concerningly, another seems to be developing that slight discolouration of the base of the tail that preceded the others. I have attached an image of that as well:

Any advice would be greatly appreciated!!

 

[Slackydave]

Apologies if this is not the correct area, but after months of no issues with my tank I seem to be having a bit of an emergency! About a week and a half ago, one of my 10 T.Hengeli passed away. I was not particularly surprised by this, as this one had seemed particularly feeble ever since i got him, with poor colouration, and an oddly misshapen tail. I know that I probably should have removed him straight away, but this is my first tank, I didn't want to kill a live fish, and I don't have a quarantine tank I could put him in. All others seemed well, so I assumed it was an isolated incident. However, for the last 4-5 days, one of the other Rabsora has seemed very unwell, starting with a paler complexion, and what seemed like a darker discolouration near the base of the tail. Now, white lumps have appeared on both the tail and on their side, and they seem very unwell indeed! I'm not sure what to do about this, as I have no idea what's causing it. I've attached a few pictures, but my apologies of they are not so clear, as they tend to hide near the back of the tank most of the time. Any advice on how to proceed would be appreciated, as if it is infectious i would rather it didnt spread.
View attachment 125763
View attachment 125764View attachment 125766


Even more concerningly, another seems to be developing that slight discolouration of the base of the tail that preceded the others. I have attached an image of that as well:

View attachment 125765

Any advice would be greatly appreciated!!

Is this ich? Maybe someone more experienced can confirm or do some googling on ich for comparison

 

[Essjay]

It's not ich - that looks as though the fish has been sprinkled with salt. But I'm afraid i don't know what it is

 

[Derigriff]

Update: after a long period of nothing seeming to change, the one pictured has sadly passed away, and the one with the slightly odd tail now seems to hold their tail at an odd bent angle on occasion, like some of the strength is gone(?) even more concerningly, one of the Cockatoo Apisto in the tank seems to be having some trouble remaining stable in the water, almost turning on her side on occasion! This also happened with the Rasbora towards the end when they were at their worst, so i'm starting to panic here, and have no idea what's causing all this and what to do! Apologies for the delay in posting, there's been a significant Covid outbreak in our household, with various members including myself falling ill at different times. Due to this, i havent been able to give this matter the attention it needed. Any further advice would be greatly appreciated!! I don't want to lose any more fish, or have any of them suffer. In particular, the Apisto are fish i am greatly attached to, and am greatly concerned at the thought of losing the one, and risking the other (there is also a Pleco I adore in the tank who seems fine for now, but that's another concern). Would an aquarium salt treatment be effective? The only problem with that is that due to the covid issue i mentioned earlier, frequent daily water changes would be incredibly difficult due to use of communal areas and facilities necessary. Thanks again to all the responses, and I hope that someone knows more information about this issue!