You're fine but in addition to SantaMonica's comment if you're new to reef systems I'd suggest two things to help get an understanding of how things are going in your system; First, at some point during the first few months pick a week or two and test frequently and include 4 or 5 days in a row at the same time. Second, for the first year as your system matures test test everything at least once a week t get a feel for how your tests correlate with how your animals are doing. After a while undoubtedly you will revert to just using the eyeball test like most of the rest of us but being diligent for a while will help give you a better understanding of how things work.