I know water stability is key to a successful reef. My tank has been doing great for about 6 months now. Corals have been growing like crazy. I test weekly for calcium,alk
,mag,and all seem stable. Just wondering how much of a swing in alk
is acceptable. After WC
is 9.9 dkh
...One week later just before weekly WC alk
is 9.1dkh. Is this ok?