Pollen, little bugs, etc on the surface of water ...

[ewarren423]

Hello All,
i'm all about q's this am.
we have 2 mains and 2 skimmers.....
right now i have all 4 active. is it a fair hypothesis that closing the mains for a while would make the skimmers more powerful and remove more of the surface debris?
typically, do people keey all open and periodically adjust or keep skimmers open/mains closed?
thanks!

 

[257WbyMag]

When the pump is on, I prefer to open my skimmers only and close the main. I get the best skimming action that way.

 

[jrguzmanr]

When the pump is on, I prefer to open my skimmers only and close the main. I get the best skimming action that way.

When do you use the main?