Okay.
I am stuck.
Based on advice here, when I chose to downsize my system I gutted everything out and went with (6) 3/4" constant flow siphons, one to each 1/2 barrel. They fill from an elevated 275 gallon IBC via gravity 3/4" lines with 1/4 turn ball valves to adjust flow as needed. They fill very slowly. The siphon engages but doesn't release. So instead of ebb and flow I have trickle in and trickle out constantly.
What gives?