Phosphoric acid in the sparge water

I don't see Phosphoric acid listed BeerSmith. Am I missing something. Also how would you note it is added to the sparge water?

Tony

Hi,
  Just add it yourself as a Misc ingredient - Go to Ingredients->Misc and click on the Add button.  Set it to be used in the mash and it will show up there on the brew sheet.

Brad

Wow, I can't believe I didn't figure that out. Thanks for answering another dumb question. 

Tony

Go light on that stuff.  One drop drops my pH almost two points.  In about 3.5 gallons.

MaltLicker said:

Go light on that stuff.  One drop drops my pH almost two points.  In about 3.5 gallons.

Click to expand...

Of phosphoric?  Isn't that the 38% stuff?  I use 88% lactic, and I measure in eye-dropper's full (roughly a milliliter).  A single drop does nothing.

Granted its highly dependent on the buffering capacity of your local water (alkalinity).  I have about 100 ppm HCO3.

But, yes go easy on acid additions.  The pH won't move "at all" until you exceed the buffers in the water/mash.  Once the buffers have been used up the pH will drop precipitously. 

I use EZ water to figure my additions.  For a new recipe, I then add half the addition, measure the pH.  If I'm not there yet, I'll add half the remainder.  Repeat until the pH is there.