UNLISTED-PARAM EFFECT (schema has no 'rb'): rubidium +5 ug/L per 1 ml per 100 L (manufacturer page + calculator 1/100/5); max +25 ug/L (5 ml/100 L)/day. Calculator target 70-130 ug/L.
faunamarincorals.de/en/Elementals-Trace-Rb-250ml/15002V
faunamarin.de/wp-content/uploads/2021/04/FM_HTU_ELEMENTALS_TRACE_EN_NEU_291121.pdf
lab.faunamarin.de/en/calc-elementals-once