This irrigation well is so bad, build up in some of the pipes is 1/4" thick, restricting flow. vertical and horizontal surfaces are stained BAD! Clean em' Its bad 3 days later. What type of filtration system will work and roughly how much?

Its a 50 foot well with a 3hp motor, 200 gallon pressure tank. I need at least 15-25 gpm, replenish rate is good. I have plenty of indoor space for filtration if needed.

Also whats the best way to clean this crud from the inside of the pipes. Chlorine? Bleach?

I've had some experience with bad water before, but this is VERY BAD! a "Rid-O-Rust" system is not an option.