Not bothering doing any tests, as it is obviously fine so far. The Phosphate checker should be here soon, and when Nev next calls around he can test the Nitrates electronically as well. Over the last few days, I have never seen my skimmer skim so much, so obviously the Pearls have now properly kicked in and so I should see the results in the tests etc as well as hopefully my corals etc begin to thrive even more. Some piccies from today. And the skim mate stinks!