IS there another way to calibrate a Pinpoint pH monitor?
Like with Milk or Bottled water like Fiji that has a pH of 7.5 ...
Or another way ?? I am stuck at my house and cannot leave til after the LFS closes.. And want to calibrate my new toy
and get an accurate reading on my Fresh water tanks 
Brand new to Electric monitoring devices.. But figured calibrating with #7 fluid would be a pH of 7 as that is what the directions say.. so just thought I coudl use somehtin around the house.. oh no bottled water here so I have to wait..
But what else could I use.. ??
Like with Milk or Bottled water like Fiji that has a pH of 7.5 ...
Or another way ?? I am stuck at my house and cannot leave til after the LFS closes.. And want to calibrate my new toy
Brand new to Electric monitoring devices.. But figured calibrating with #7 fluid would be a pH of 7 as that is what the directions say.. so just thought I coudl use somehtin around the house.. oh no bottled water here so I have to wait..
But what else could I use.. ??