Alright, that was a learning experience. Sadly, PFRs lost their life due to my ignorance.
So 50% WC completed using RO, that was at 0 on my TDS meter, combined with tap water until a ph of 7 was reached. TDS of the mixture was sitting at 76.
Here are the current test results.
PH >7.2, <7.4 yes I know that leads to a result of 7.3 but since my test kits don't have a color for 7.3 I'm reporting what I know for certain.
Nitrate between 5.0 & 10.0
I'm guessing I will want to do another partial WC in a few days to drop the TDS more??
I don't see any shrimp, but I know I haven't pulled out anywhere near 40 dead ones. So hopefully they are just hiding in they plants.