Yes, PGA is pure grain alcohol. Generally folks around here use Everclear. If you are lucky you live where you can get the 180 proof. FL limit is 151 proof but it works just fine too. Higher alcohol content just dissolves the crystals better.
Helpful hint: When the little dotted line appears below an acronym (like ECF in the above post), hover your mouse over it and it will tell you what it stands for. (Usually. Sometimes people use the same ones for more than one thing. Like BP as you can see if the dots appear below it is for big pharmacies. But on the notcigs forum it is Buzz pro. Gotta keep things confusing, ya know.

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