Some of my SPS keep dying and I am not sure what is wrong. I just noticed that I have actually not tested for alk.. I will order a test kit to arrive sometime next week. ( salifert). Now, say that the numbers are not good. How can I fix it? BRS Bulk Soda Ash (Sodium Carbonate) Aquarium Supplement - Bulk Reef Supply Will this do the trick? Any other suggestions?