Here is my a question. I had 4 panda cories. One stayed little and the others grew. Then it died. Did not see that coming. Then another one died but that could've been avoided if I had kept up with the water changes that month. Back on schedule and I checked the levels every week and all with in normal range. I bought a living plant and a snail. The water is clear the fish look happy so I bought 2 more panda cories. Now, one grew, the other is still small, like it shrunk or something and it's barbs( the wiskers?) are really short and looks like it's going to die. Is there something I'm missing? I don't want to go through this again. There's nothing else I can think of to do. Please help.