The standard in high-quality air pumps, provides high performance and reliability. Acoustically designed for smooth, quiet operation. Silent Air X-4 is recommended for aquariums up to 65 gallons.
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I brought this, as a backup for my old resun. But, it’s more noisy than my old resun. You will notice the difference every night.
I am pleased with the quietness of the pump, I bought it for a 2nd backup for my primary pump, but instead am using it for the primary, and keeping the old one for “backup”.
I have had this pump running for about a year and find myself quite satisfied. The pump pumps air through an almost 48inch bubble wall hose and the other hook up currently just off gases as we don’t need it at this time. Over all the pump is fairly quiet as long as it is balance properly. If the pump becomes unbalanced or leans against something it becomes quite loud as it vibrates quite a bit.