gorgonians for trace elements
coralline growth and rim coloration for calcium and Alkalinity
some LPS for magnesium
Fish breathing if and when I place new life into the tank
Euphullia corals for water quality for water changes
Front glass for HC-GFO changes
Acans for carbon changes
Actual testing happens every few months
Probe for temperature and PH always online although check ounce a while
lower branches of SPS for water movement and magnesium
