Maintain

[82nd]

Hello,I have 120 gal tank,PH is 8.1,Alk is 8.9 Dkh,Cal.is 445 and I happy with that but to get there my PH.was 7.8 and Alk.was 7.7 and my Cal.was 550+.So I decided to just Dos soda ash and everything is were I like it ,so now how do I maintain it? Because I my Cal.will continue to go down.I do weekly water changes and I use hw-marinemix with a Cal.490 and Alk of 7.

 

[Cichlid Dad]

What do you have for coral