http://www.reefiris.com/profiles/psam/data Elos mini 20G http://www.reefiris.com/profiles/psam/tanks/95 kH - Alkalinity 6.0 Ca - Calcium 400.0 Mg - Magnesium 1250.0 NO3 - Nitrate 20.0 PO4 - Phosphate 0.25 SG PPT - Specific Gravity 33.0