Just getting my new 35g tank up and I bought it with an old, used Penguin 330 that made some loud rattling noises so I purchased a new Penguin 350. Got it on thatpetplace for 38 bux including shipping (ft lauderdale Fl.) This filter is great, it's rated for up to 70g so within 2-3 hours, the water was super clear. The difference in sound is nice too, it's quieter and splashes less water. I have some plants and a piece of driftwood with some moss growing on it and plan on starting to cycle it soon then get some fish. THinking about some tiger barbs, mollies, tetras or maybe some fancy guppies. I'm loving this tank, I'll post some pics real soon.