Day to day Checks for me have been
Daily / Bi-Daily
1) Easy Look at the tank see if anything looks out of place corals knocked, over fish swimming strange, algea starting on a spot, whats the glass look like, are all the inhabitants still there?
2) about every 2-3 days change out filter sock.
3) Check to see if skimmer is functioning properly
4) How is you water top off
5) Check Salinity about every 1-2 day depending on your system if you have a monitor what's it saying.
6) Check Alk 1-2 days dose as needed
7) Feed fish or corals what their diet requires
8)Scrub Glass if needed (if all is in Check shouldn't have to do this very often)
Weekly/Biweekly
1)Pull Skimmer cup, Clean well replace back on skimmer re-adjust flow
2)test your basics to know what amount to water change. (Ammo,Nitrite,Nitrate,Phos,Cal,Mag,Alk,Ph,Salinity,Temp)
3)Clean Glass well
4)Change Filter Sock
5)do 10-15% water change maybe more depending on Test levels.