I took me 5 minutes to reverse the action and make it a vacuum for use with a custom SMD pickup tool. All i had to do is rotate the white drum 180 degrees and it's a Vacuum! Fantastic! I just bought a dispensing syringe, put a hole in it and viola! works better than the expensive models! Lots of youtubes out there how to make one yourself!
Verified purchase: Yes | Condition: New
I bought this to replace my old pump (the same model as this one) that was making a lot of vibration noise and it was getting noticeably worse as time went by. What a relief to get a new one! I have two fish tanks in my bedroom, so it's such a relief to not have to listen to the air pump noise after replacing the old one. It seems these things start to make a lot of noise after couple of years of continual use. But when they're new, they're nice and quiet. I didn't realize there was such a huge difference. ^^;
Verified purchase: Yes | Condition: New
The 20-40 gallon Tetra Whisper Air Pump I'm using on my protein skimmer in my sump on a 29g. Coralife biocube. It is very quiet and has the power to get the small fine bubbles to come out of the lime wood air stone. The key to airstones in a protein skimmer is the finer, and more bubbles the better. So I have some room to turn it up more with my valve.
Verified purchase: Yes | Condition: New
No, not silent. You can still hear a whisper. Basic, no-frills air pump. Rated for 40 gallons, powers two sponge filters at 20” deep no problem. Filter #3 was a bit too much though.
Verified purchase: Yes | Condition: New
It is a little noisier than I would like, but it really is powerful from both nozzles. For the price (less than $15) it is a great deal. With better application I might be able to make it quieter.
Verified purchase: Yes | Condition: New
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