I wonder if it would be interesting for a hybrid pool heating & filtration system where you are already in for a cost of a pump.
The differential cost would be for an additional panel array loop and some isolation valves etc.
The differential cost would be for an additional panel array loop and some isolation valves etc.
On the other hand, pool water has chemistry which may make it unsuitable for using in combined panels. Especially if it's a salt water pool, you don't want that water anywhere near electronics. The typical pool solar heating panels are basically just thin black plastic that the water flows through.