It sounds like that whatever it is, it is affecting the smallest and probably the weakest fish in the tank. It may be bacterial in origin, as you said that the treatment for mouth fungus ( Flavobacteria spp ) did appear to slow the progression of the disease down. This is something that the fishes h...

I think you will find that most aquarium white spot treatments are based on malachite green/formalin mixture (often called LeTeux-Meyer mix in aquaculture) with a stabiliser, others are chelated copper(II). Of these, formalin is the biggest killer of nitrifying bacteria- and everything else. :( That...

peat filtration is especially good for corys, but not why Peat filtration is only necessary to acidify the water to the lower pH levels some of the species seem to like. Some peats have slight water softening properties but not to a great extent. Many corys like soft, slightly acidic water but do n...

Going back to your description of the corys swimming erratically & on their sides , this would indicate to me that there was either a physiological problem with those fishes or a disease problem. Excess nitrate would cause symptoms of poisoning (agitation and 'panting'), rather than disorientati...

I have always kept otos in planted tanks for the very reason that they prefer to clean algal growth off the leaves. I first noticed this behaviour some weeks after I started keeping them. That was over 20 years ago. I have spent many hours observing fish behaviour, more so when I was studying fish b...

I have been keeping otos for years and they do chase other fish. Sometimes its difficult to see the point because they never catch them! However, they do scrape mucus from other fishes (mine try it on the corys) and often persist even when the target fish shakes them off. They obviously like somethi...

From what I can see there must be something else affecting your corys, other than the water chemistry. IME corys are pretty much tolerant of high nitrate, and if they don't like the water they are placed in they react immediately by swimming agitatedly around the tank and making frequent visits to t...

I was only responding to a topic with which I am familiar! Besides, since when are roach related to cichlids? You need to get your taxonomy sorted out; but with a phylogeny like yours I am not surprised you are behind the times. I could talk about some of the parasites I have removed from catfishes....

Damn! I removed several from some roach which I autopsied some weeks ago. I threw them away as I have lots in formalin. Next time I will save them and send them out to you guys...........

ROTFL.

Next time I go to the store I will make sure that I have my magnifying glass with me (!)

Thanks, Ian, much appreciated.

Roman

I found this subject interesting. I am a qualified aquarium technician and have kept and treated numerous species. Firstly, all treatments on the market (with a couple of exceptions) are harmless to fish when used in the correct doses. Very few affect the filter bacteria unless the label specifies t...

Thanks guys, I've had a look on the E-Catalog and it is the same species. I might give it a go.

I have seen some corys in my local store under the name of Corydoras duplicareus, they look similar to adolfoi. What is the info on this species, and how easy are they to keep please?

I am sorry that you have lost your fish. I had a similar experience two years ago with cory habrosus: I bought 11 and put them in a mature tank with two otos. some time later they came out in white, fluffy growths around some scales, hung around for some days and then died. I examined the fish and c...

Perhaps we may now see a chink of light in that dark tunnel that is cory taxonomy! It was always hinted at that the divisions between these very similar genera were tenuous at best. Strauss (1985) came to the conclusion that the morphometrics that were used to define many cory species were meaningle...