raising alk with baking soda

[jolson10450]

my alk has been a little low lately, everything else is fine:

ammonia - 0
nitrites - 0
nitrates - 0
phosphates - 0
mag - 1350
calcium - 430
alk - 7

i would like to bump my alk up to 9 and i have been reading about using baking soda to do so, anyone have any experience with this? i used the reef tools calculator and it says to add 1.4tsp of baking soda to raise my mag in my 30g tank from 7 to 9. i am assuming i will have to do this daily but not sure? also i know i will have to mix it in water first.

would i be better off getting something like seachem reef builder and just adding it to my ATO, can i add the baking soda to my ATO?

i see a little bit of my sps polyps not extending fully now back from when it used to be roughly 10 and i believe this is the issue.

Thanks for the help!