I have 2 150's in my 6ft 300gal peninsula. 1 mounted horizontal in my overflow box and one mounted vertically next to my overflow box. Horizontal pulsing at 90% for 10 seconds and vertical at 100% for 5 seconds. Seems to be suffecient without blowing the sand around at all. Also they don't communicate so that keeps it pretty random. My return pump is a jebao dct 12000 running at 80% at about 6-8ft of head.
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