Hey Ratchet~sorry I didn't respond sooner.
Honestly I am not that experienced with diagnosing illnesses. I've been treating minnows, it's ongoing and I had to euthanize several this past week. From what I could tell it was serious bloat, possible septicemia possibly from parasites...I used Kanaplex and Furan and Prazipro. Both before and after and during a few of them hemmoraghed, some were gasping, some just stayed huge. I had been many months with it...it started when I didn't turn on my ac soon enough this past summer. We all freak about heaters... but it didn't occur to me to cool my place down. I'm frugal a d was using g fa s thei g to save money, anyway, the point is that is about all I could contribute!
As far as I know, for the Pea, (recommended for constipation, and combined with garlic for worms...I think), I know you book a frozen green pea and take the skin off, mince the inside and feed it to fish...
I would start a new thread asking for specifics on that.
I hope your guppy is okay, if not I really hope you get another tank set up and keep at it.
I am stressed now because I am not sure if I should treat my new Peacock Gudgeons for worms before I put them in their destination tank !!!
After I get that settled I am going to shut down some tanks, for,a while I had three extra tanks for treating and one 3.5 for a single fry. Crazy making but it will be worth it.
Eventually I have a plan for my tank scenario, until the. I am a slave to gill and fin and water!!!
When I am sure about something I will share, though.
Or sometimes guess with disclaimer

I worry about giving wrong info ..
Ps: whenever I get stuck and need help fast I may start another thread...which is my plan at the moment!