[jrf1175]

What is the best way to look for air ENTERING a system? What are the possible sources? Skimmer, Return pump, leak in piping joints....

I tried to put some soapy water on the plumbing joints but didn't notice anything, not sure what else to do or how else to check?

I have a submersible return pump so would the only source of the micro bubbles be the piping between the return pump and the DT?

I am gong to unplug the skimmer for the night and see if that helps too.

If that doesn't work hopefully it will miraculously fix itself while I am away.

Thanks again...and again...and again....(-;