CAl and alk levels

[Skimmerking]

Well As you know that I switched from sps to mixed reef. when i had my sps tank the levels were going like crazy... Now I have hardy anything in the tank for Calcium consumption I have 2 clams a going to be having 2 more in the next day squamosa and a maxima or so baby bubble, hammer coral, and some coraline. my levels has been the last month 420 CAL and ALk was a 10.2 I do about 5 gal water change every 2weeks or every4 weeks So is the levels staying consistent.

I have been checking the levels every week to keep up. Should I be checking every month then.

here is my levels over the last month.

CAL 420
Alk 10 range
temp 78.5
mag 1300
salinity 1.024