I bought 5 Neon Tetras a month ago and they're still doing great. But, that's not my problem. When I bough them, I let them sit in a bag in my tank for 30 minutes and then I put them in my Breeder Net. I actually did that because they were so small and I was afraid of my Platies picking on them. I was wondering if parasites can travel through the net and get into another fish. Should I use a QT next time? I am thinking about getting some Red Cherry Shrimp and maybe a male Swordtail.