I use RODI water. Tds=0.
Collect to a 220 liter container. Container has an airpump to keep the water moving and aerated.
Take some water to a 50 liter container and remineralize with salty shrimp bee gh+ or salty shrimp gh/kh+ depending if I do water change for caridina or neocaridina.
Values for water change:
Caridina tds 120ppm
Neocaridina tds 180ppm
Water temp around 22
I do weekly 25% water changes.
I measured values for ph, no2, no3, nh4 in the three taiwan bee problem tanks. Calibrated ph meter and for the rest jbl liquid test kit.
PH in caridina tanks between 5,9 and 6,6 depending on the age and active soil used. (Akadama, red bee, tropica soil, shrimp king).
PH in neocaridina 7,7-7,9.
NO2 and NH4 in all measured cases 0.
NO3 between 0 and 1. I use small amount of ferts mixed from dry salts that is the reason NO3 might be 1.
I use dry fert mixes for my planted tanks and I have created very mild versions for shrimp tanks. I can provide details if needed.
One thing I forgot to mention is that I have had odd deads in orange sakura tank for more than a month. In the beginning I lost 1-2 a day. Now I have been able to improve the situation to maybe one casualty every second day. They breed and has shrimp from all ages. When they die they dont have the same symptoms as the taiwan bees. Actually they have nothing visible.
The reason I mention this is that the tank had in the beginning fish that have been in the same tank with wild fish.
I suspect that maybe the fish carried some bacteria that transferred to orange sakura and from there further. Maybe Neos are more tolerant to the bacteria than taiwan bees..
Im soon gonna go to garage and see how situation has evolved.