Honestly, the Seaclone is fair. Some have had good luck with them while others hated them. It's a hit or miss here.
If you're serious about a good protein skimmer, I would look at the ASM series, reef devil deluxe (I own), or some people on here have used the Coralife skimmers with good luck. Just remember: sometimes the manufacturer says it is rated for a certain tank volume. For instance, the Seaclone is rated for a 90gal, which would work on a 55 gal
ok, but I wouldn't use it on the 90 gal
. You get the picture. Also keep in mind that the skimmer you purchase will determine whether you will need a sump or not. Some are inline, sump, and hang on. HTH