Recently back in the fish hobby after 20 year hiatus.
Came home to tequila sunrise female guppy laying dead on a sword plant - looks to be internal bleeding. She appeared to be ready to give birth in previous days. Had her for 9 months. Was treated a month prior with a male guppy for mild fin rot (quarantine trio). No signs of discoloration before I found her today. No issues with the other guppy, 2 neons, cory and oto in same aquarium. Feeding extreme krill flake and frozen brine shrimp. Should I treat/medicate the other fish?
10gal aquarium. Heavily planted (water sprite, java fern, red melon sword). pH 7.5 Nitrate 5 Nitrite 0 Amm 0 kH 3 Gh 180
