awall
New Member
I've had my tank set up for over a year, but like all people, I made some mistakes, lost a few fish. After my last original fish died a couple months ago I was about to give up, but decided to start over. The tank had that couple months to cycle without fish, I thought it was nicely established and was ready to try again. So I spent about $200 on various fish, put them in and everything seemed to be doing great until a couple days ago. I noticed some discoloration but only in spots...kinda like they'd been hit with bleach. MY six line wrasse was the first to show these signs, it showed them for about a week then died yesterday. This morning I noticed my mandarin dragonet had the same discoloration, it was dead 2 hours later. I tested the water, and all the tests came up looking good. So my question is what could be causing this and how can I fix it?