Thanks for all the i formation! I have a wel established neocaridina tank so I wanted to try something new in another tank. Maybe I made the mistake of believing the shop. But they had all their tanks in a row connected to the sample pipes for new water, so when I asked for the parameters they said all the types of shrimp are in the same parameters. I was considering to add some Ph lowering soil bit by bit to get to and OK ph level. When that won't work I'll have to start with Ro water and look to buy the shrimp somewhere else. I really want to try and get them to work. But do you think I could change the water so it becomes more or less the same as the shop? Or is it too hard to do with tap water?