First, is your measurement of 3.2 in dkh or meq/l? If its meq... that sounds good.
If its dkh...then you will need to do some adjusting of your water chemistry.
I suggest before you go adding buffer to get your alk from 3.2 to ~9 I recommend getting a second test kit reading. That is quite a large alk adjustment and if your reading was incorrect, will cause major problems.
Try reading this:
http://www.advancedaquarist.com/2002/11/chemistry
The article is not an easy read, but, if you read through it a few times it will help you understand whats really going on. I found it extremely helpful on more than 1 occasion.
You will also need this link to help calculate how much buffer you will need to add:
http://reef.diesyst.com/chemcalc/chemcalc.html
If you use unbaked baking soda to adjust, it wont raise the PH as much as baked baking soda
And finally, nothing good happens fast. Remember to go slow with additions.