Okay so bit of a long story here... I recently ordered an anacharis plant online for my planted tank. The tank is a bit less than 5 gal has rcs, an oto and 3 neon tetras. I am very meticulous about the tank checking, and observing it daily with regular water checks and changes. I anchored my anacharis to a stone after giving it a nice rinse and plopped it into my tank and went to bed. Next morning I went to watch everyone swimming around, the fish were all great looking, but didn’t see any shrimps. This was instantly worrying to me, I always see at least a couple shrimp hanging out on the grass or on the hydrocotyle plants, plus one of the females recently had babies and none were to be seen. After looking around the edges of the tank I began to find the adults they were all curled up and wedged in tight spaces. All but one adult was dead. I did some quick research online and people were saying they had this happen when putting in new plants because there was copper or pesticides on the plant which the shrimp are sensitive to. So I took the plant out and placed it into a tub of water and did a water change. I thought to myself “lesson learned, clean the plants thoroughly before adding them to the tank” but that wasnt the end of it. I went back to my tank to observe the last adult shrimp, and noticed a baby too. My hopes got up a bit and then I noticed something on my shrimps nose like a white speck. I did some more research and thought at first it was Scutariella. However after further observation I noticed this was definitely something else. This thing was moving around the shrimps rostrum quite a bit and I could see it was agitating the shrimp (took a video on my iphone but its too big to attach). It didnt seem to bother the shrimp to much at first but after checking back after a couple hours my shrimp was having seizures, twitching and looked so so distressed that it turned my stomach. I kept observing because I was having trouble finding anything even similar online. After some hours of torment the shrimp looked lifeless. And then it gets even WORSE, the baby that I saw earlier which was definitely free of any ecto parasites now had the same thing crawling on its rostrum. I fished out the dead adult with my net and sure enough there was no parasite to be found. I went to the local fish store and showed the guy some pictures and videos and he said he’d never seen anything like it. Has anyone else seen this thing before? Im thinking maybe the anacharis was grown in a lake and a parasite hitch hiked maybe? I’ll attach the best pictures and videos of it I was able to get. Some details I noticed: it has an antenna looking thing that it swings around kinda like Scutariella, but unlike Scutariella it moves around a lot, it seriously stresses its host and presumably kills them, and it will target both adult shrimp and babies. I picked up some kordon ich and parasite treatment from the fish store, if all my shrimp end up dying do you guys think this will wipe out these degenerates so it doesn't happen again? Thanks for any thoughts and answers!!!
the images and videos were too big to add to the post so I uploaded them to imgur for anyone whod like to see: https://m.imgur.com/a/CjQiCFW