, I think a ALK
reading of ~10DKH is fine for SW
tanks. Some people like to bump it up to 11 DKH
, but there really hasn't been any evidence to suggest that a high ALK
like that helps anything.
If it were me, I would actually let the calcium fall a bit.
However, if you really want to know how to raise the ALK
here is the info.
Near the bottom third of the page, Randy describes how to raise ALK
using either Baking or Washing soda depending on your tank pH.