Okay so I am new here and I am looking for some answers.... I have a 40 gallon tank that I've had established for about a year I have several different varieties of platies probably about 12 total I also have to Neon tetras to zebra danios... Water temperature is kept between 75 and 80.... About 8 months ago I was given quite a few plants from a friend and I ended up getting snails to help with the snail population I added a clown loach and a decent size goldfish to the tank... The last 2 which were added about 1 month ago.. About 1 week after I added the loach and goldfish I started noticingthe platies we're turning up dead all in all all of my platy