thanks guys
some parameters I took this morning
Ca 420 (Api Test)
PH 8.2 (Api tested and RedSea tested)
Amonia 0 (Api test)
Alk 2.5 (RedSea test)
NO2 0.1 (Tropic Marine test)
NO3 2 (Tropic Marine test)
PO4 0.01 (Tropic Marine test)
Salinity 1.025
Temp 25.7°C / 78.2°F
Nitrates a bit high so guess a water change has to be coming up soon.
Any advise on what else to look for?