Baking soda = bad?

[Willito]

Have you tested you alk with another test kit just to be sure? I find aged alk test kits will give you false readings. Do you run any phosphate removal media in conjunction with bio pellets and carbon? If you do, be cautious, this three combination will strip your water "clean" and if all changed at the same interval, it will shock sps. Finding the right balance takes a little practice, something to think about.