paralysis

I've kept fish for 23 years and grew up with my parents having fish but I've never seen this before. One of my harlequin rasbora suddenly, over night with no warning, started swimming erratically and in circles, upsidedown. It's lost a lot of colour and seems to have a cut on its dorsal fin and...

We have a female Guppy that has a clamped tail and partial paralysis. She is swimming and feeding okay. None of the other fish in the tank seem to be effected. Is this something as simple as a stroke or should I start a form of treatment just in case? Any recommendations?

Please help: Sterbai Cory paralysis, twitching, "seizures" Hello, I'm posting on this forum because one of my cories has had a rapid decline in health. I've  posted on several sites and have gotten very little advice or none at all. I'm trying to be as  detailed as possible with pictures and...

Hello. I joined this forum to ask this question. Here's my current tank set-up: I have a 20 gallon tank with an under-gravel filtration system as well as a new power filter (rated for 20-30 gallon aquariums). I don't have a good water testing kit but the pH is pretty much 7.0, no detectable...