Whats your budget.. i would suggest for for the best skimmer you can afford with... Anyway you can search ard the net for macro needlewheel and you will notice that there are alot of problems.... Oh ya bubble count in the macro needlewheel also CMI(cannot make it) thus even those skimmate may be kopi o but its not effective..... I used to be a weipro user.. comment is that the supplier over rate this skimmer..... bubble count in weipro reaction chamber is even worst so if you can afford deltec, H&S get them.. if not get at least a DIY beckett from one of the sponsor here.. gurantee you see difference and save you the hassle of continously upgrading... I have been there done that so dun want other reefer to follow me