Roseline Shark Question

berg

New Fish
Sep 18, 2007
1
0
0
#1
Roseline Sharks are dying

Hello,

We had 5 roseline sharks and one just died. We thought it might have been pregnant as over the last few weeks it got larger and puffy, the scales become much more pronounced but it died yesterday. We have 4 remaining and it appears that they are starting to look similar to the one which just died. We have a 400 gallon tank with live plants, we tested our water and do need more iron and to increase the hardness of the water but overall the tank testing fine, there has been some algae. We want to save these fish, does anyone know what could be the issue?

Thanks.