You mean foaming of the water in the skimmer? not really I wouldnt think because you can control the back pressure by adjusting the gate valve. It might cause some bubbles in the sump from the water splashing down.
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The most beautiful thing that we can experience is the mysterious. It is the source of all true art and science. He whom this emotion is a stranger, who can no longer pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed. -Albert Einstein
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