When it comes to fish diseases, I'll admit I have been very lucky. Minus the few cases of ick here and there, no big deal. I have read horror stories about people losing large amounts of fish, so I do consider myself very lucky that this hasn't happened to me.
Ok with that said, I got home from work tonight to find one of the male swordtails dead at the bottom. I first tested the water, to make sure nothing crazy has happened in the last couple of days and it appeared to be fine, nothing out of the ordinary. Next I looked to see it there were anymore more dead fish, nothing. Upon further inspection of the remaining fish, I noticed little red spots on about half of the fish. Some of the spots were brighter than others, some were longer, some more noticable, and some were just a really pale pink. I did a google search to see what I should do about this, and I have narrowed it down to about three or four possible things this could be. (Unfortunatley they all had three or four different solutions also) The fish are all acting quite normal, so besides the red streaks everything seems to be fine.
Does anybody know what this is, and what I should do about this?
Should I be worried about it killing my entire fish population?

Ok with that said, I got home from work tonight to find one of the male swordtails dead at the bottom. I first tested the water, to make sure nothing crazy has happened in the last couple of days and it appeared to be fine, nothing out of the ordinary. Next I looked to see it there were anymore more dead fish, nothing. Upon further inspection of the remaining fish, I noticed little red spots on about half of the fish. Some of the spots were brighter than others, some were longer, some more noticable, and some were just a really pale pink. I did a google search to see what I should do about this, and I have narrowed it down to about three or four possible things this could be. (Unfortunatley they all had three or four different solutions also) The fish are all acting quite normal, so besides the red streaks everything seems to be fine.
Does anybody know what this is, and what I should do about this?
Should I be worried about it killing my entire fish population?