Alk values

[Proteus]

I am using reefers best salt and have just been doing water changes to keep values up. I do 5 gallons on Tuesday and 10 on Friday. So far so good

I know that alk in RB is 7 which is what they recommend on zeo systems. I use prodibio. My tank is 35g +/- sps loaded. I know as tank grows that it will consume more cal alk. But wonder if alk should be a little higher

Params before w/c
Ca-400
Kh-6
Mg-1040