Recently one of my bronze corydoras has been acting and looking a little abnormal. He has gotten very pale and is constantly swimming around the tank; his gills seem inflamed and he has dark spots (or cuts?) on them as well. It seems like he can't control his swimming, almost like a mild case of SBD
. He can swim just fine but whenever he tries to rest, his tail begins to float up and he almost flips over. It's not at the point he's doing barrel rolls or anything, it just seems he has trouble with his swim bladder.
I'm not really sure what's wrong with him. I'm thinking SBD
, gill flukes, or ich. (He has white spots on him, but there's a very good chance that's just sand on him haha) I've tried peas already and he seemed fine afterwards, but the next day he was back to abnormal swimming. Any comments or help is welcome!
What are your tank parameters (ammonia, nitrites, nitrates, temp, pH)?
Ammonia 0 ppm
Nitrite 0 ppm
Nitrate 0 ppm
How large is the tank? How long has the tank been set up?
10 gallons. It has been set up for about a year now.
What type of filtration are you using? Please give the name and number (i.e. Fluval 304) and amount of gph if known.
Top Fin® Silenstream™ 10 Power Filter. I think the gph
is around 70? I don't know for sure...
How many fish are in the tank? What kinds of fish are they and what are their current sizes?
10 fish, 6 assorted male guppies and 4 cories. 3 bronze and 1 peppered. It's probably worth noting that I plan to move the cories to my 29 gallon tank which already has a school of both breeds established
When is the last time you did a water change and vacuum the gravel? How often do you do this? How much water do you remove at a time?
Last Tuesday. I do a 25% water change weekly and a 50% water change monthly.
How long have you had the fish?
I've had him since early March.
Have you added anything new to the tank--decor, new dechlorinator, new substrate, etc.?
I changed the substrate from gravel to sand when I did my last water change. I know this likely stressed them out and could be the cause of his illness. After all, it's only been recently he's acting like this. There was two new plants added during the substrate change from my 5 gallon tank: Ludwigia repent and cryptocoryne wendtii.
What kind of food have you been feeding your fish, have you changed their diet recently?
I feed a variety diet, and there has not been any changes. I change between live daphnia, frozen black worms, frozen blood worms, omega one freshwater flakes, fluval bottom feeder bug bites, and hikari sinking wafers. They occasionally get peas and cucumbers as well. Anything live or frozen is mixed with Boyd vita-chem.
(Photo 1 is the fish in question. Photo 2 is comparing him to one of his buddies)