Originally Posted by ZxC
I'm not a breeding expert when it comes to fish, but tetras cannot become pregnant, they are egg laying species. I would first rule out any soft of bloat diseases first.
Yeah I read up about them not being live bearers which led
me to here. The colours aren't as vibrant as the smaller ones as I did consider it being neon tetra disease but its moving around fine with no visible lumps or signs aside from the belly being swollen along with the reduced colour.
I'll keep an eye on it over the next few days, it just seems to have ballooned suddenly. Water paratmers are - 7.5PH, 0 ammonia, 0 nitrites, 10-20ppm nitrates. Water temp is around 25C.