I started having some issues, slowing growth and colonies of SPS starting to RTN (just lost my OP colony). Anyway, probably calcium related but I thought I would share my ICP results because I had two tests run from the same system, this should show us the differences between the two. ATI - //lab.atiaquaristik.com/share/baccedaa1048479309b5ICP-Analysis - View attachment 8754A note on measurements.1 μg/l = ~ 1 ppb1 mg/l = 1 ppm1,000 ppm = 1 ppb