I got home yesterday to both the remaining shrimp dead. When I left the flat yesterday morning both were alive and hanging out on the moss balls. Its so soon after getting them that I'm not sure what happened. . . So, I tested the water.
Ammonia: 0
Nitrite: 0
Nitrate: 5 ppm
However the pH was really low, like 6.0 . . . tested it out of the tap and came out as 7.6, so used the high range and got 7.4. I'm assuming this is the mopani dropping the pH, but could it be something else? I'm a bit concerned now about taking the kilifish home until I know its not a problem. I couldn't get prime in the local shops, so I am using the Fluval brand water condition which does chlorine and chloramine and heavy metals. Considering they died 3 days after I got them, I'm guessing it shouldn't be a contaminate as they would have died right away? But the fact that I lost one within a few hours, makes me concerned.
Any opinions? Should I do a big water change and see what the pH does over time? I'm not sure what to do here.