Everyone in the tank has been 100% healthy including the Niger Trigger. This morning, I saw the trigger hiding, and the rest of them have a white (not looking like ich) stuff on them. The triggers eyes are puffy and white looking. I don't understand what has happened. The only thing I did over the last two days was leave the lights off to combat some brown algae. Please help. I attached a picture of the Niger. I had a problem a couple weeks ago with flukes and treated it with prazipro and everything was perfect for over a week. This is really upsetting, I am not sure what went wrong overnight!?