I went to get blue velvets but fell in love with red crystal shrimp S grade instead Dx so I got two to see if I could keep them alive before getting several more. What are there chances of survival and how long before I will know if they will survive in my care?(a month? A week?) **I have fluval stratum and my tank is set to 80° but I will lower it to 78° tonight. Tankmates are 5 harlequin Rasbora and 1 betta and soon a nerite snail or mystery snail. It's a 15g.