My experience with a SeaClone is so-so. The bubbles that it generates are not fine enough nor numerous enough to perform effective skimming. Also, the little black control valve is not stable and I think it slowly rotates, so you have to keep tweaking the setting of the skimmer a few times per week. I switched to a Coralife 65 and I'm quite happy with it. Once it got through the break-in period of 3-4 days, I never have to adjust the settings. I clean the collection cup every week. My tank looks beautiful and my water parameters are great.