I got 6 cherries, within 2 weeks all but two died. By the 3rd week. All gone. I watched some die, they were just kicking around on their back as if they were shedding. Although when I came back a few hours later they were half eaten! I don't know what I've gone wrong with to be honest. I have a feeling it may be the introduction of root tabs? I did ask the vendor if they contained copper and were invert friendly and he said they do contain trace but it should be safe. Who knows? its been a few weeks on and I'm considering testing the water with some Amano's to see if they fare any better. I do want shrimp rather than algae eating fish in this tank.