<a href=showthread.php?s=&postid=11679382#post11679382 target=_blank>Originally posted</a> by rvitko
Usually foam starts to develop in 2 days but it takes 2 weeks for it to fully break in. If it is running almost silently and the waterline marked on the skimmer is about 1/2" above the water and the screw is open 4 turns or so it should start to work.