I took a trip to the city and found pineapple swordtails. I instantly fell in love and bout one of the only two they had (both males) by the time I got home he had died. I chalked it up to the car ride or maybe separation from the other male. Wanting more pineapples I got my local pet store to order them. When they got here I bought one male and one female and one black male (as I had three black females and no boys at home) on the third or fourth day I had them the male died! So this past Tuesday I went back to the pet shop and bought the one male they had, a very young one. Today, Friday everything was all good the first two times they get feed and when I got off work I came home to find my male dead again, just sitting at the bottom of the tank just like the other two had done. I can't figure it out. My tanks not crowded. Other than my swordtails I have a couple platy (that I also got Tuesday) and up until Wednesday I had Cory cats in with them that got moved to my other tank because I had bought some peaceful catfish. I wanna figure out what's going on because I moved the Corcyra into my other tank that had one Plecoptera some Cory cats and all 30 of my baby (turn 3 weeks tomorrow) red wag swordtails. All my other fish are fine, even my black male who's fairly young looking. It only seems to be my pineapple MALES.