I don't have a seaclone, but could you post a pic? There are past threads about how to tweek your seaclone skimmer. Skimmers basically pull water in a chamber and inject air in it. This creates a foam where Junk rises into a collection cup. hth
The basic test kit should include Ammonia, nitrite, nitrate, ph
, and copper if you need to treat a sick fish.
There are many good articles in the Articles section about getting starte. The getting started forum has many good posts that may also answer your questions.