Technically, fish don’t drown—they suffocate. But that’s just semantics. Watch for these red flags: your fish is constantly at the surface, mouth wide open, looking like they’re trying to audition for a horror movie. Their gills may move faster than a hummingbird’s wings. If the water smells like rotten eggs, that’s hydrogen sulfide—it means oxygen is gone, and bacteria are throwing a toxic party.
How to add oxygen to a fish tank? - Apure
Emergency fix: Do a 50% water change immediately. Add an air stone if you have one. Point a fan at the water surface (yes, it sounds insane, but moving air helps dissolve oxygen). Your fish will go from “dying drama queen” to “grateful guppy” in under an hour.
