Fauna Marin Elementals Trace RbELEMENTALS TRACE Rb ELEMENTALS TRACE Rb is a high purity rubidium solution used for compensating rubidium deficiencies in reef aquariums. The Elementals series is designed for use with regular ICP analyses. The Fauna Marin ICP analyses help you to keep your aquarium perfectly supplied. In addition to the measured values, Fauna Marin ICP analyses provide you with all necessary dosage recommendations. In addition to the salts of the macro elements