How often do you tune your herbie overflow?

[lastlight]

I use the trickle trick as well. I've never been able to exactly match the return pump's flow so I opt to send some down the emergency rather than let the primary suck any air.

I shut my return off every week for my water change since my return compartment isn't large enough to keep it running. Upon restart I have to adjust the herbie every single time. Week to week tho it never needs tuning.