We filled our 26000 gallon pool from our well. I would encourage you to pre-filter the water to remove any metals. We installed a whole house iron filter ahead of our water softener and used that water to fill the pool. It took about a week with several regenerations of the water softener and several cartridge replacments on the filter.

Our well pump is down around 300 feet and rated at 22 GPM. We wanted to use the softened water as we were planning on running a salt water pool with an SWG. It worked out really nice and we've had crystal clear water since startup in early March.

Now that we have our salt level where we want it I fill directly from the hose connection on the pump but still run the water thru a whole house iron filter before it goes into the pool. We have heavy metals in our water here in south Texas.