I have seen shrimp on You Tube and did about 4 hours of reading on them. I knew they would be small but somehow my mind was not prepared for just how small. I released 12 Amono shrimp and they immediately disappeared (my tank is heavily planted) and after a week I finally spotted two. I also released 10 crystal red shrimp and within the last week I have spotted one briefly. I have to laugh at the situation because of all the money spent and how good they are at hiding. I don't think I will be buying any more shrimp because of the way my tank is set up. If I had a spare tank that I could make a species only tank then perhaps I would buy more.