Dropping 1 DKH per day

[MarkoD]

Is it possible that my DKH could be dropping 1 per every 24 hours.

I've been keeping closer track to it and thats how it looks according to my hanna checker.

Im having to add 50mL of alk solution to raise it back up. Im trying to keep it at 7dkh but it keeps dropping to 6.

I have a 70 Gallon display tank with SPS, LPS, zoas and 9 clams and a frag tank.

Total water volume is 160 gallons