I had 2 fish (a royal gramma and a clown) die in my QT last week. It's a 10 gal
with a HOB
filter, I seeded the foam block with my DT for over 4 months. I don't have any tank lights, just a glass cover. The RG wasn't eating so I figured he was sick when I got him. I had two clownfish in the tank and they weren't getting along so I thought one killed the other. The lone clownfish was eating and looking happy so I put him in my DT since he had been in QT for 3 weeks. As soon as I put him in I realized he was covered in ich. I never saw it with the lights that were in the room or when I looked at them with a flashlight. I pulled him out of the DT as soon as I could and put him back in QT. He has now died.
Is my DT tank in trouble? I have 1 pajama cardinal and a bunch of inverts so I don't think he's going to be stressed in any way. He's been the only fish for several years.
What do I do with my QT as far as cleaning it out and starting over with new fish? Can I still use the foam block or toss it? Can I use my DT to seed another foam even though it might have ich in it?
I'm so upset because I thought I was doing everything right by setting up a QT only to have everything die and may have infected the DT
Lesson learned, don't skimp on lighting even for a QT.