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tkeracer619 · 03/08/2018, 10:55 PM

I've seen this with a loose fitting post di. It could be letting air in so what you are seeing is the tube draining, filling, draining, filling, ect ect.

I'd recheck fittings. Post a pic of the unit.

03/08/2018, 10:55 PM	#6
tkeracer619 Registered Member Join Date: Jan 2006 Location: Westminster, CO Posts: 17,289	I've seen this with a loose fitting post di. It could be letting air in so what you are seeing is the tube draining, filling, draining, filling, ect ect. I'd recheck fittings. Post a pic of the unit. __________________ Hobby Experience: 9200ish gallons, 26 skimmers, and a handful of Kent Scrapers. Current Tank: Vortech Powered 600G SPS Tank w/ 100gal frag tank & 100g Sump. RK2-RK10 Skimmer. ReefAngel. Radium 20k.