those levels seem low but acceptable for those few corals
1) test kits - what brand are you using
2) salt - what brand are you using
your CaCO3 demand is extreamly low/almost nonexistent with your bioload - with a good salt mix you should not have to dose anything yet = just do water changes - - my rec for your system would be 10% twice a month for now with a good salt like reefcrystals and then 10% monthly once stable
coraline algae will consume some though so your 10ml per day should be fine as long as your testing with good kits, your coraline growth is good and your results are reasonable
not to hijack your thread with my pics but this may help:
small tank, a ton of zoas, monthly water changes about 20% NO DOSING of any kind
34 gal tank softies only minimal water changes and NO DOSING of any type
125 SPS tank weekly 5% water changes dose 1/2 cup 2 part per day and all top off water kalkwasser