Just about 3-4 days ago i had a male guppy that just stayed at the top of the water idling in one place, but still moving his tail, he did that for a day and a half and i thought he was just swimming against the current, but then the next day he was dead, and there was no signs of illness or disease, anyone know why he might have died? water was fine n everything. And now i have a female thats kind of doing the same thing. not sure what to think because i dont knwo what it is.