rite now i am confused about what protein skimmer i should buy you guys are saying that a protein skimmer is a big envestment but i found a berlin counter curent air lift for 30 bucks and the ventura stile are around 150 is a counter curent relly inifeshent or will it be a nufffor a 30 gallon reef-so my question is (is a countercurent as effective as a expensive ventura) :?: