I may be oversimplifying things but I have alot of room on my property and can run as much black poly pipe as necessary.

Would there be anything wrong with just laying out 1000 or 2000 foot of black poly pipe in a big loop in the field behind my Pool as a solar heater?
I would just create a slip stream off my system.

I have a 24' round ag pool (12,000 gallons) with 1 HP pump on a 200 lbs sand filter.

Does anyone see any issues with this? I'm not sure how much pipe is enough and if there would be any pressure loss issues.

thanks,
JK