SeaClone skimmers are notoriously bad. They dont skim well when properly adjusted and difficult to 'dial in' When I first started out I assumed skimmers are all the same. So I bought a SeaClone because that's what the lfs
sold. I couldn't get it to skim, and I bought a second one, figuring the first was broken. I ended up returning them after a few weeks and bought a better unit- for around the same price.
If you purchased the skimmer new, you might consider returning it, since you might never get it to make foam.