oscar sick, dropsey?

I recentley got divorced and for 2.5 months my ex was taking "care" of my tank(150 in sig.) I nwas finally able to get a permanant home last week and when i picked up the tank this weekend, the water looked like dark beer( the Butti's 55g was sparkling), and I noticed right away that one of my O's was swelled up, and skin around the anus is tearing. I think It's dropsey, and has popeye for sure , what is the best treatment or is it something else? I have no pic (she has the cam) but, I can't believe she "didn't notice", and I found out she never once cleaned my diy w/d filter, the floss was solid fish poo. I don't know how long my poor fish has been affected. SHe said " I couldn't get in there to scrub it" she sure got in the bottom back corner to take my $25 piece of driftwood. what makes me so mad is that she KNOWS how to take care of fish, we were together for 7 years and she was right there with me as I was learning(not as enthused ) but she knows how to do better than she did. anyway, please advise.

:cry:well, I treated w/ meddication for 12 days and she didn't get better, I was inspecting the lesions before I had to leave my tank w/my new roommate (as he has never had luck w/fish(most likley lack of education)) and blood started pouring out of her gills so I had to euthanize via freezer. I think she was pretty much gone anyway when the blood started coming out, she barley made a fuss when I bagged her and put her into her cold dark tomb.:cry:

thank you , such a shame to needlessley lose such a beautiful fish. R.I.P. Scarlett...
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