Hello Mojo and skimmer experts!
I'm having the exact same issue that JG1 was with his ATB, but I have an SRO-1000int. Mine is on a brand new 75 gallon with dry pukani rock (had some crusty dead life on it that made the water yellow and stink for a few days) and filled with freshly mixed instant ocean (I haven't added any water conditioners or additives). The skimmer output is above water and gate valve is wide open. I have it in 6.5" of water and it has been constantly overflowing for a little over 2 weeks now with no sign of any reduction in overflowing.
What do you recommend doing to help this maturing process along? Do weekly small water changes that will be part of my normal maintenance routine? Add a hardy fish? Add organics (fish food) to help ensure that the cycle doesn't backtrack? Raise the skimmer (6.5" sounds about right from what I've read, but I could put it on a stand to sit in about 5")?
Thanks very much!