About two weeks ago, I bought a new Fire Shrimp. That same night I did a water change, replacing ten gallons of water in my 46 gallon tank. The next morning I found my Fire Shrimp lying on the tank floor, practically dead. He passed a few hours later. Later that night I saw what looked like an off-white version of my two peppermint shrimp lying on the tank floor. The next morning, they were gone! I assumed that these two shrimp had molted, and were since hiding.
It has been over two weeks since I last spotted either of my peppermints or my skunk cleaner shrimp. On the day of my water change, I tested the water and Nitrates, Nitrites and Ammonias were all 0. PH was 8.3, and my temp was 78. SG is 1.022.
I started using a new food for my clowns, called OraGlo, I bought it the same day as my Fire Shrimp. I tested the water last Friday, and Nitrates spiked to 40 ppm. I finally put my skimmer on that night, and by Sunday the Nitrates had fallen back to 10 ppm.
Do you think my shrimp are goners, or that they are still just hiding?