1.I test for calcium,alkalinity,phosphates,ph and magnesium
2.ph and temp allways displayed on my controller,
calicum,alk,phos...every week
magnesium....every month
3.I use API for cal,alk and sailfert for the rest
My perameters are
temp 79-80
ph 8.3
cal 460
dkh 8
mg 1400
po4 0