What’s wrong with my guppy??

[geragonz]

I have a 55 gallon tank with 6 female guppies, an electric blue dwarf ram, and a bunch of babies. Recently I introduced a new female whom I did not quarantine like I usually do. My mistake. She acts like a normal fish sometimes but other times she hides or rests under decorations. I’ve caught her “shimmying” a few times. She doesn’t seem as excited to eat unlike my other guppies who are super healthy. I’ve had her for 2 days and today I noticed she has a white patch on her side. More like discolored scales. As soon as I saw that I moved her into the only thing I had which is a good sized bucket with a sponge filter.
my perimeters: 0 ppm ammonia
0 ppm nitrite
5 ppm nitrate
7.5 ph
What’s wrong with her? Is it contagious? How do I cure it?

 

[Fishmanic]

It’s a slow time on the forums. But in 5 hours or so someone should provide an answer. Meanwhile enjoy our forums and please vote in the Fish of the Month contest.

 

[Circus]

What are your levels of Gh and Kh? If your water is not hard enough, switching to a soft water environment might have shocked her. As far as I know Rams like very soft water and guppies like harder water.

Are her fins clamped? It could be a parasite or something similar. I would start her on a dose of aquarium salt in her water. For my guppy fish I use 1 tbs per 3 gallons of water, for general maladies. I up the dosage if necessary, up to 1 tbs per gallon.

I usually do a 1hr dip in paraguard while my fish are in qt.