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=my-mollies-are-dying#1 I recently did a 50%water change and put in some water treatment to treat cloudy water. I also took 50% of my fish to a local store. The tank started clearing up and the remaining fish seemed very healthy, zipping around and breeding like crazy. A few days later the tank was still pretty cloudy, so I did another 50% water change, adding the water clarifier, algae control and aquarium salt. The fish became listless and most of them settled to the bottom. Thinking I had added too much "stuff", I did ANOTHER 50% water change, and added NOTHING to the water. The fish seemed to perk up a bit. This morning most of them were again lying on the bottom and several had died. They continue to die. Some of the fish, however, appear perfectly healthy, and the one Betta I keep in the tank appears fine. Can anyone help me save the rest of my mollies? cmickelsen 2010-01-03 http://forum.aqua-fish.net/?topic=my-mollies-are-dying#2 How long has the tank been running before you added the fish and was it fully cycled. 50% water changes are far too large in one go, the cloudiness sounds like it is a fairly new set up and the filters haven't yet colonised with enough bacteria to cope with the fish. mickey 2010-01-04