When I purchased my 30h tank at my
Lfs the salesmen recomended the penguin 170.After 6 months and many partial water changes I can say this filter is the worst ever made.Cloudy water,loose particles floating about.It might be way underpowered for this tank. Fish are not overfed,they consume all food .This is a freshwater tank.I would like to hear some recomendations.I'm thinking of trying the aquaclear 300 or rena filstar xp cannister 2 or maybe the magnum 350(marineland).After being away from the aquatic world for some years now I would appreciate some input. The best filters some time ago were the aquamaster PMEorPL models.The dynaflos were also good.