Elementals trace Cr 250ml ELEMENTALS TRACE Cr is a high purity chrome solution used for compensating chrome deficiencies in reef aquariums. With ELEMENTALS TRACE element solutions you obtain a cheap and easy possibility of dosing used up elements in your reef-tank DOSAGE: 1 ml /100 Liter (26 US gal) = +0,5 µg chrome /liter<br...