I have a Seaclone and it skims well, but the o-rings are constantly having to be replaced. I have this figured out now, but I have lost quite a bit of water- soaked up conviently by my carpet- before I figured this out. I e-mail the company complain and they send me replacement o-rings quickly. I realize that they will lose effectiveness, but every third collection cup change is a bit excessive. I think a new skimmer will be next on my purchase list.