Back in the late 80s, I read the first version of the rec.aquaria FAQ an they couldn't praise the Aquaclear more. So I bought, what was at the time, an Aquaclear 150, to replace a Whisper 1 power filter. I loved it. My tank has an Aquaclear 300 on it now (now called a 70) and I think I've had the same sponge since the day I bought it. I've given older Aquaclears I have had to people (had a mini and a 200 at one point), and they come back to be months later telling me how much they love them, and they'll never buy brand xxx again.