OK. Glad to hear it is green and cloudy (algae problem) rather than green and clear (metals problem). Go ahead and keep hitting it with bleach as frequently as you can test and redose. Also, run the pump 24/7. It will clear if you consistently maintain shock levels.

As far as whether or not to drain and refill, it is your call. If you can live with the high cya and the subsequent higher chlorine levels, then fine. If you stop using any stabilized chlorine and if you continue to have rain additions and subsequent drainings when the pool gets too high, over time, your cya will come down. But, it will take time. When you do get a lot of rain, run the pump and circulate for awhile after the rain so it gets mixed in with the rest of the water before draining. Otherwise, you'll be draining mostly off the top of the pool via your skimmer which will be the rain water which has no cya in it. This might be the best plan since you are on a well and will avoid the necessity of adding well water and dealing with the possiblity of metals in the well water.

On the other hand, if you want to try and do a partial drain and refill, you'll have to do so carefully with well water. Read through some of the threads in the metals section for some info about dealing with well water.