Plz help!

[Nuttygal! :0)]

I have a lot of guppies in my 45gal, along with other various fish. I just got back from holiday yesterday, and one of my XL female guppies was dead. Then, as I was feeding them later that day, I noticed my other XL female acting odd. Looking closer, I saw that she has got a big white lump on her left side, it looks solid, and three of her scales were sticking up, but they looked like they were hanging off.
I don't know what's wrong with her, but she is pregnant, as all of my females are, and I don't want it to effect her or any of her fry. What is it and what can I do?

 

[Ben]

i dont know about thelump but the scales seelike the start of dropsy, which is asically untreatable,just do lots of water changes
what are your water readings?nitrite,ammonia etc
DD

 

[Nuttygal! :0)]

What lots of little water changes or big ones? How is dropsy caused? My poor little guppy.
I'll get my water tested at my LFS tonight, I really need to buy a test kit.

 

[Ben]

dropsy is usually caused by bad water conditions,
do 25% water changes

DD

 

[mrplaty]

i had a molly wih a similar problem and used interpets anti bacteria treatment!! and it seemed to work