My temp, pH, nitrate, conductivity, calcium, orp and dissolved oxygen is digital constant hourly recording on computer desk top display. I check alkalinity, phosphate, iodine and strontium once a month. I use a refractometer every week to check my conductivity meter accuracy. I recalibrate my pH meter once per month. I do a chemical reagent test of nitrates every two weeks to check the nitrate monitor as it is fairly new and I do not know its trustworthiness yet. I do a titration test for calcium every month to check calcium monitor.
Electronic test equipment and computers may not be cheap, but they make reefing a lot easier. I am glad I have nothing to support but mysef and reefing.