Kevin,
Sorry to have taken so long to reply, been reparin fence the deer knocked down today - no tractor time..
Hydro fracking is a process by which a well co. puts a boot or seal in your well casing about 40-50' down then injects air & water below this point under pressure to crack fissures into the bedrock releasing the water. Typical pressuse are 2500-3000 PSI..
This process is not for all wells pending the local subsurface conditions and geo structure. I would talk to a few drillers and get some feedback from local drills. In our area either you hit it or not, because 1/2 mile away they got 50 GPM at 150'. It's a matter of hitting the vein or "hydrofracking" your way to one.
If you have sand likely it's softer subsurface than here, so they would "frac" the well lower if there is bedrock to produce more water. Cost is about $1500-2000. Darned expensive well but worth it in the end.
So you have 3 choices, drill a new well (second one) and get a guarantee of X GPM complete with a pump tank etc, probably $4000 range (the local drillers guarantee this) or frack your well, or stay with what youve got.
In my case the guys that did the well did the fracking too, so after the first $3500 in the hole they agreed to hydro frac N/C if they could not triple the flow (1.5 to 4.5 GPM) it was a freebie.
Carl