You filled the skimmer with water first??? Did you prime it properly with pinching the air intake hose off till it straightens out, the valve should be adjusted until the bubble line is around the neck. .
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360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras
360 Reef Tank
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