Critical:
4 - Salinity - 1.026, when mixing
3-Temp - 78-80
2-Calcium - 420ppm, weekly, to monthly
1-Alkalinity - 7-10dkh
Test every few days to start. Once a week after, Monthly bare minimum
pH - 7.8-8.3 - once a month
Non critical:
Nitrate - 0-2ppm = SPS, LPS = 10ppm, 20ppm too high
Phosphate - < 0.03ppm, 0.1 is high. Check 2-4 weeks
Magnesium - 1300-1350ppm once a month or large water changes
Chlorine/Chloramines - once a month
Ammonia -