I've had rcs in a 10g since november. I started with 25 and must have between 100-150 at this point. I picked up another 10g at my lfs and I am considering purchasing either tiger shrimp or blue tiger shrimp depending on my funds. All the research I have done has told me that these shrimp are far more difficult to care for. My question is what exactly about caring for more expensive and advanced dwarf shrimp is more difficult? I keep up with water changes, haven't had any rcs deaths, and have a corner filter graded for up to 75g. What else goes in to raising more advanced shrimp?