I think the water just got saturated with adding it all at once . What is your calcium level? If it is high, it could be carbonates falling out of the water. If it doesn't clear up after a few hours add some acid to take the alk and ph back down. Make sure you do just a little at a time and wait 2 hours in between tests. Then you can start to raise them again slowly testing in between additions. You should always do this when adding baking soda or borax.