i purchased my berlin classic about 6 years ago on special for $295 from HFF. never regretted it. only needs a strong pump to run it. removed heaps of crap when i started zeovit but has since slowed down to 2 collection cups of yuk per week. could i skim more? i would say yes! do i really want to skim more? i don't know! as my water quality is near perfect, all my corals look healthy and grow well. have had my alvepora, goniopora and fox coral for well over a year now. so my skimmer seems to be just the right size for my tank and system (in this case zeovit) and i can not see me spending lots of money on a new one. its not broken and seems to work pretty good so why fix it? to have the biggest gruntiest skimmer to show off with? and then loose live stock and replace it constantly? nah i guess i will keep my little berlin a while longer. should really clean it, properly, but don't want to murder all the little tubeworms that live in it.