I have lost over half of my fish. I have a 75 gallon tank that I broke down for several months last year when we redecorated our first floor. I restocked the tank beginning in November. I do have a problem with brown algae that doesn't seem to want to go away. I started losing fish a couple of months ago. Many of them had white stuff all over their body. Then it appeared as white sticks. I have used Coppersafe for the last two weeks because we thought it was anchor worm but that doesn't seem to have affected it. I have atttached some pictures. The congo tetra has the worm like thing atttached to the dorsal fin that got really long but appears to have broken off. Anyone have any ideas of what I can do? I have to be careful of the coppersafe because I cannot add anything else while that is still in the water. Thanks for your help.