you will definitely find mixed opinios on the seaclone skimmers,
why is you are looking at them, cost? hang on? or tank size?
I personally don't care much for the seaclones, but think they are adequate for a smaller tank, b/c who wants to spend 400 on a skimmer for a 30 gallon tank, but i feel almost if not alll skimmers and equipment is over rated, adn showul be considered as such, never buy a skimmer that is rated for 90 gallons for a 90 gallon tank, go for a larger yet
if it is price, then, meaybe, but one thing to know is that in this hobby(esp with skimmers) you DO get what you pay for
now last question, if you are looking for space and hang on, i like the remora pro(withthe mag drive pump, NOT the rio), they are an outstanding skimmer but unfortunately the are a bit more pricy than the seaclones, BUT WELL WORTH THE DIFFERENCE, if you can swing it
HTH and good luck