Just an update. I had gone over a week without a WC and ammonia was between 0ppm and .25ppm, so I did a change yesterday. My remaining two girls are doing great and the one that started being attacked by the bacteria or whatever it was has fin regrowth from where it was damaged, so I'm praying my girls are in the clear. Snails and guppies are all doing well, too.
It's tough. I only have the two girls left, which is clearly not good. It is a 30g though and the filter is kind of strong, so they get easily deterred swimming and if they're together, they usually go their separate ways in 5 seconds and explore another part of the tank or look for food. I could remove one, but I don't have a spare heater for another small tank at the moment and with working 2 jobs and being a full time student, on top of dealing with whatever happened, well, quite frankly I'm too tired to have to do constant WCs on a smaller tank. These girls have been together for months and both seem fairly docile, so hopefully things stay mellow until I figure out what I'm doing. I don't want to introduce any more girls yet since I may be getting into wilds, which would eventually be moved to the 30g. I guess I could pick up another 2 or 3 though as they could go into the 10g if the wilds go in the 30. Since I see them at work all of the time, it's kind of like its own quarantine period. Maybe on my next shift I'll buy a couple. Haven't seen any that really caught my eye though and after losing so many fish, I am not in a rush to add more. I need to treat and clean my 10g since the bacteria ran rampant through there as well. Ugh.