Thanks CoryfanAad, very helpful. It's the exact same thing. My first thought ages ago was Lymphocystis but I also read it supposedly doesn't affect corys. But who knows. It hasn't spread to any other fish and in fact the old tank where these corys were has a group of small loaches and they've been p...

You could have been unlucky and got diseased corys. I listed anything else I could think of. Soil tanks can go anaerobic at the start because the soil is too rich. It can go away in time because most of the organics will eventually break down, lots of oxygen and poking the soil more often helps, eve...

Are they in different tanks? I am not an expert but what can work is leave the tank with the corys in question without water changes providing the tank can handle the bioload and then do a couple of large ones, not necessarily with cold water though. It mimics the rainy season and can trigger them t...

Sorry to hear about your corys. Do the rest of them go to the surface? Are the nerite snails and shrimp doing ok? How did you acclimate the fish? I do think it's quite a bioload to add in such a short period of time but it's a large tank and well planted and if you exclude the possibility of an ammo...

Thanks CoryfanAad. No, I would never use this kind of sand in a cory tank or in any tank for that matter. I binned it. I had river gravel in that tank for years with no problem and changed it only because of the corys. So you think its bacterial based on the thread you remember? It would be great if...

Well, it seems I've got to get to a microscope I suppose.

It's odd that there's so little knowledge about fish diseases unless it's something common like ick.

Are there any good books on cory diseases I can check?

I've been looking at one cory now that has it. Besides the white ball it looks like there's a split in the dorsal as well but the white stuff is not on the split part but on the back side of the dorsal as in the pictures. Despite that I've never seen any get any permanent damage but maybe it does af...

Thanks so much for the suggestions guys. The microscope is a good idea but I'd have to see about it though as currently its not an option, plus catching a cory in a planted 5f tank :-O Going back to the first post : are you using JBL Sansibar black sand? Not anymore. It was that sand that triggered ...

No one?

I'd like to revive this thread because whatever these corys had/have is ongoing but it doesn't kill them. All the corys that survived the initial outbreak more then an year ago are still alive and have been living in another large tank since. They are about 1year and 8 months old now. Most regrew th...

Nice cory.
I've never seen such blue eyes on a cory.

Thanks Bas Pels. I can still keep it in this tank, it's just that I have to change the substrate and replant the plants. The substrate may leach ammonia so I can't keep it in there after that at least at the start. I am still afraid to move it to another tank. It's doing so well where it is. The tan...

Thanks Jools.

I put the thread in the wrong subforum by accident

Hi. I have an otocinclus fry that I found when taking a tank apart just after I caught all shrimp and ripped all plants out. It was just a couple of days old then because the yolk sac was still attached. I left the project on hold to let the otto fry grow a bit...in a bare tank with just sand and I ...

I am sorry about your fish. I'd start first with testing the water with a liquid test kit and not strips. 80F is way too high for the cory species you have. I'd bring that down to 74-75F. The bioload in there is on the high side with 16 fish. It's not that it's not manageable but it needs large regu...

Thanks Dave. I saw it but it didn't help me figure it out.
What do you think?

It's not that it matters that much what type of common plec I have but I am just curious and get confused. :d He's definitely a Pterygoplichthys because of the number of dorsal rays but I am not sure whether he's P. Pardalis, P.multiradiatus or P. disjunctivus. I think his belly pattern isn't exactl...

Corydoras sterbai can be problematic fish to ship. When they are stressed and in confinement they often exude a toxic secretion. This can induce fatalities very fast. I raised a thousand back when they were retailing for about $15 each but found that shipping problems were too severe to continue to...

Glad your cories have spawned and best of luck with the babies. I suppose you figured the sexes of the parents too :d . I am pretty good distinguishing the sex of other breeds of cories but with my sterbai I really am useless because their shape is kind of deceiving me. However the males have pointy...

Hope the rest make it through. It's a lot of corys. I'd do daily large water changes. Keep the tank clean of any decaying stuff, clean filters. It always helps. Test the water, the Ph shouldn't be swinging and it's best to have some sort of Kh to prevent the Ph from dropping. My water is hard. I hav...

I am really sorry about your corys. It's devastating, especially when you can't fix it and watch them drop one by one. I am afraid I can't diagnose what they have but I'd like to ask have you checked the Ph, Kh and Gh of the water? Any changes? With 300 corys you can have the Kh get down to 0 pretty...

Maybe put them in a tank with a group of corys that do spawn regularly. This may trigger them to spawn too. Or if you have corys in another tank that are spawning, use that water in the green laser's tank.

The only time I experienced this was in one of several tanks with corys. It had been running for 2.5 years. From very healthy and active they became super shy. My pygmys used to be out all the time, then I couldn't see them for a week and more at a time and I had to search to find where they are hid...

prairiefire wrote:I mostly use the Hoplias aimara method for euthanizing.If you don't have that option available you could put the Cory in a platic cup with tank water and place it in the freezer for an hour.

This sounds like quite a slow death to me.

That's horrible man. Sorry to see that. Is that tank cycled because you said you've got ammonia and nitrItes in the water according to the this below? Ammonia NH3/NH4 4 mg, NO2 1 mg, NO3 10 mg Also, why are you using a Ph/Kh adjuster. That causes more problems than anything. If you've got those read...

Bad water quality and debris on the sand specifically will contribute to that. Corys co-exist very well with shrimp and shrimp and snails are a great combo to prevent pathogenic organisms like bacteria and fungi from taking over and keep the living area for corys relatively clean. This is especially...

They don't uproot my dwarf sag so I doubt it they will yours. You can see one of my tanks below, it's not totally covered so I am not sure what yours is like but the bottom used to be almost fully covered as I had eleocharis at the back which I removed to give the corys more sand area.

Many fish will have a nibble at vegetables. I don't have any that will refuse, including corys eating cucumbers.