Lynn, I wish I had not gone over to test my display tank. I thought I would see if there was an ammonia spike from a dead firefish. Since I had the test out, I went ahead with the ammonia, nitrates, and nitrites.
First the good news, ammonia and nitrites are 0. Nitrates on the other hand are through the ROOF.
What could have happened????
I haven't done anything except change the water recently. I did 20 gallons!