I got shrimp 5 days ago, 7 neo-caradina that were different colours. 1 small clear, 2 medium lighter blue, 1 medium darker blue, 1 medium red/orange, 1 large maroon coloured and 1 large dark green. Acclimated them correctly and they all seemed happy. Next morning I woke up to all but the darker blue and the green one unresponsive, but managed to revive the red one by putting it in a cup with an oxygen pump. I assumed I had done something wrong so tested the water twice a day, making sure I fed them the correct amounts and did small water changes daily. Yesterday I woke up to find the red one had passed. The green one seems fine and the light blue one I'm assuming is just hidden in the plants as I've not found it on the floor of the tank.
Today I went to the shop I got them from, brought a water sample and explained what happened, water peramiters and ammonia came back fine. The shop owner told me he's only seen it once before, and thinks the green shrimp is killing the other shrimp, if the other shrimp is alive I'm going to bring it to him tomorrow so it doesn't get killed too, but I'm going to keep the green one. The owner gave me some snails to live alongside the lone shrimp. My tank is a small tank with live plants that I only wanted shrimp in, it's too small for fish, so I don't mind keeping the murder shrimp with a couple of snails as he seems happy 😅😅
Anyway... Anyone got any name ideas?