One of my guppies (previously well, have had him for a couple months) has stopped using his tail! He is managing reasonably well with his dorsal fins keeping him buoyant and moving, but he is not moving his tail at all.
The rest of the fish seem fine, including a handful of other guppies. I did have a corydora die the other day (got him out of the tank before he died, so no tank pollution), which seemed a bit out of the blue.
What could it be? It doesn't seem like a swim bladder thing because it completely can't move its tail. I even tested by holding it, it couldn't even wriggle.
Tank is ~70L
Tank mates: Guppies, pygmy corydoras, kuhli loaches and some RCS
Just did a water change, letting the dust settle before I test parameters (forgot to test before I changed the water)
Recent additions: three guppies added a week ago (doing well)
Also physically looks fine- no spots/lumps/bites etc
The rest of the fish seem fine, including a handful of other guppies. I did have a corydora die the other day (got him out of the tank before he died, so no tank pollution), which seemed a bit out of the blue.
What could it be? It doesn't seem like a swim bladder thing because it completely can't move its tail. I even tested by holding it, it couldn't even wriggle.
Tank is ~70L
Tank mates: Guppies, pygmy corydoras, kuhli loaches and some RCS
Just did a water change, letting the dust settle before I test parameters (forgot to test before I changed the water)
Recent additions: three guppies added a week ago (doing well)
Also physically looks fine- no spots/lumps/bites etc
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