I might be getting another 10g tank soon and want to get shrimp. Never had them before and I want to set it up right. My water is hard and the pH is around 8 to 8.2. What are the best shrimp for these conditions? Obviously I can't get many in a 10g, so what's the minimum amount I should have? I'll also be putting some of my mystery snails in with them. They're compatible, right? What's the best substrate to use? What plants do they like? Anything else I need to know?