The Rena Air 400 was created with noise suppression chambers that were designed to absorb vibration from air movement. The unit has fitted rubber feet to also help stop vibration with surface it is seated on. These new features help to make the Rena Air 400 extremely quiet. The unit was designed to have a very powerful putput and can maintain great airflow even in lower depths. The Air Flow Control knobs on the Rena 400 allows the air flow level to be adjusted up and down.
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Tried several pumps, I own two of these pumps. I use them pump in a 55 gallon and a 46 gallon. Extrememly quite and powerful. Great purchase.
this pump is great i went to the local pet smart and they let me plug it in at the store and listen to the different pumps. price was no option and it just happened to be 19.99 when i bought it for my 10 gallon aquarium price was no option to me just the most silent pump i could find. so far it has been excellent i gave it a four star because after a few weeks it does get louder but i just plugged in another pump for the day and let it cool down and it was back to normal. i have had for 2 months by the day of 9/23/04
This is the most powerful quiet pump available. Hands down. Now, it’s not the most powerfull available, but then again, who wants a turbine running in their house that they have to listen to all day? This pump is plenty powerful (only mildly less than the louder models) and a great choice. Believe me: I’ve tried them all. Pretty long lasting as well – My last one kicked the bucket after 4 years of hard work.
I’ve never had a pump this quiet. I’ve had it for two months now. It really is almost silent.