Soda Ash or Sodium Bicarbonate for KH?

[PFoster]

I have been using the Fauna Marin Sodium Bicarbonate for several years now on a dosing pump and am very happy with the results as you can keep you alk in the 7-7.5 dKh range and my pH is rock solid at 8.3

I would recomend that if you have a high coral load in your tank you should test often, especially if you are trying to maintain your alk close to NSW (7 dKh).