http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=swordtail-sickness#1 I've had mine tank for a while but just in the last few weeks I've been losing my adult swordtails none of the other fish in the tank are dieing so I'm worndering if there is some kind of sickness that just affects the swordtail. The were ok until I bought a nother set and put in the tank the new fish died and then my other swordtails started to die. cyndi 2009-09-29