[Newman]

it probably would damage CRS but cherries should be fine. I raised my cherries in that TDS fine, and my current yellow shrimp are also living in that TDS.
its high, but not lethal. you could buy a gallon of DI water from a store and mix it in the WC water to dilute the TDS to lower levels.

Back when my bowl ran crystal shrimp I used gallons of distilled water for water changes. one gallon lasts maybe 3 weeks at most provided you water change maybe 20-30% water volume.