I put in some solar heating panels last summer, instead of tying back into the return I simply discharged into the pool as the piping was going right by it anyways. I was just easier and everything worked fine last year, no problems.
To make a very long complicated story short, I spent last summer doing alot of fidgeting with the final discharge angle and size of fitting.
The reason, one night after testing the pool I was watching the water and the debris on top and after awhile I started noticing that the speed of water rotation was such that some of the debris that I felt should be going into the skimmer - wasnt.
So this started a bunch of changes to final fitting sizes and angles and I was never really satisfied with the final performance.
Not sure what to ask but I guess I'm wondering how I can determine if the skimmer is effectively drawing in debris, should debris within a certain distance of the skimmer be sucked in, if so what is that general distance?
In my signature, if you go to the 6th last picture you can see the discharge pipe from the solar unit.